\ 

) 

REF ID:A67163 

4 NOV 1950 I 

"'" 

SUlla:J'I le'°"'8 al t.bl United Urwtr Unf.W 8'ate8 CQnamd.eaU. 

Se.-l" ConteNnae. 

»ao:a.o.... One oew ot nltJeet NPDl'U• 

1. Aa per _. reoen ca.wenau.cm, ! aa t~ hosld~ tor .,.. ~tt.m, an advuoe ew ot eubject repoit;e, •hi.eh are belns 

autlmltted to APSAC tor eond.ctenticn and aJIP'l'Gh1 piitor to •""'al.a.tan 

to tM .roJ.at Cblef• ot St;&tt via \be ..._. .. , ca. 

a. '1'be NPOl"L• oonat.et ot -

~aloeVl'e (A) Repan on the Bapl .... ol the CCL 

!acloaUN (B) Bepor& aett.tng tartb the reeulta of the ~17 

achartge ot 1n.tonaaU.on Oil oenain 017Ptographic dnelop!l8ftta. 

3. The 8Ub.1ee' contennce prawd to be a llD8' mcoeaeN o• t:ram 

bot.I\ the u.s. amt BriU.ah ~·· an4 .I teal that. & good toandaUm 

tor future etteot.lw eol l aldatS.on .f.n the czntographlo tiel.4 baa 'bGell 

eetabl' •bed. 

Cow to: 

AFSA.-12 

AFSA-00.lllllltl•--•8'~ 

APSA-1~ 

-rep SECAE,-

l&RL le· S!OD _ Rear Admiral, u. s. la"7 

»treotor, Armed Forces Security AgenoY 

RADII Earl E. stone/dk/4 BOT 50 

AFSA-001 ED. 528 

Declassified and approved for release by NSA on 05-21-2014 pursuantto E.O. 1352a 
\ 

\.. 

\ 

,_..·· 

e REF ID:A67163. 

TOP SECRET 

:L!OP SESE! 

-- BRI!ISfI..umtUD STATES CO?JlUUICATIONS SECURITY OO?JFEREl~E 

UIMUTES OF 

TBE FilTAL ·l.EE~IUG OF Trru PLENARY _£QI;lUifTEE 

~-Final Use-ting ot the Plenary Comcd'\;tee or the British-United 

States Ccmr.wmioo.ticms SeoUr"ity Collfor·Gnce was held at 1515 en 2'7 October 

l9S> 111Room1212'1 u.s. ilmr.y Security Station" Vla.shington.0 DctCo 

REPRESEilTATIVES PBESE~ 

UNITED STATES 

-- Mr. t'i,,F,. Fr:i.edma.n.s Cha..i.rman 

Rear Admiral Earl E. Stone, USU 

Captain LeFe S~f'ord,, USU 

Captain l!oOe Tirmsen,, USN 

Ca.pta:tn J.s. llarpore USN 

Ooloml llsCo Searsli' USAF 

Colonel John a. Arrowsmith0 USA 

Colonel Roy lido Lynn8 US.AP 

ColOD8l Orville Laird8 USAF 

Lt. Oolonal ReIL. Horton,, USA 

Lt. Coloml Xelso G., Olowe USA 

Commander GeWo Liim0 USN 

Dre Ae SiJ:lkcrv 

,, 

UllITED K!lDDOM 

Mr. T.R.Wo Burton W.llel" 

Ur ci. J elleG • Polle.rd 

llrigadj.9r J olte TU tman 

Commander JoReGo ~rechmans RoNo 

SECRE'lARIA'R 

' ' 

\ 

\ 

~-= 

LT J .n'" Pearson• USN 

Mro HcDo Jones 

Uiss Catherim Uo J'ohl'ISon 

TOP SECRET 

J 

\~\···· ·-, ., 

' 

\ 

'- ' 
~- D. ~F~~D_:A67163. 

~P StCRc ! 

f; 

AmmlAL srorm ·call eel the moeti.nc to order., lie said that he had ~ 

ceivatl a noflli W ~dier Genera Uoelel lmd in much he expressed his 

npet at not; b$1ng able to attend tho closma Plenary sessione Tle explainacl 

that otticial. business had requited General UcCle1 J and' s presence 1n San 

Antonio, 'l.oa8 and the Goneral had asked that his apologies bo comroyed to 

all ccmcemecl am that his best Td.ahes bo ext~ to the Mtish delegates. 

AD7:ICRA.L S'l'OHE them stated that the Session had before it tinDl. vend.ons 

of ~ raper&; tlO 'be appro-wed f9r f~ng to the respective ~tish and 

u.s. Chiefs of Statf~ Ile suggested that, lmleea there was fwtber comant, 

the final V81'Sions of the reports bo signed e.ii that ticle,,, 

. mmw. STOHE and. w. JfiI.T.'JtR proceeded 'Vd.ih tile signing,, and EDmhmJga 

of coP!Ga, Ol Ge !mat repoil'Eio 

mrmAL srozm: said that he wished to express his apprecl at.ion for ihe 

wcrk iil!Ch bid &en accompl :J shed1 add1na his feeling that a f'irm groundwork 

fGtl' future operations in the Com:mmications Security field had been laid. 

He expresaed his opinion that the cmf'erenco had been most Worth\milei. and 

said that he tllougbt much good_ would came of 1 t. 

AD?ggi S'i'OU~ asked lll-o lliller it he had ·81\Y' comments he wished to makeo 

MR. ImL'ER responded u:ith the follmrl.ng ~I· 

11 ib.ank you V9l7 much for your recarks abouli the Conterence. May I 

a.JI.so thank you on behalf' ot the other members of the Br'itish team 

mo wore not ah1.e to be here for the close o£ this Conf'erenceo As 

10u 'IJID3' kna\"1, Capt.. Cairns is alrea"1' in EneJ,and, and the machinery 

1s pra.ct1calq set £or the retum ot the others 0£ our group. ur. 

Jcll.oy is mi.ting in Uew York, and r~t. Cole Hezm-Collins is ~ 

Canada, b'oCJ. mence he will return to Hen" Yolk and ~ home tram 

there. So far as the Confei-ence is concerned, I muld. thoroualll.v 

endorse ~ remarks tha~, the Cont'orence has been an out;standing succoss~ It has been a landmal'lc in this particular _art, It. is a. 

landr.m.rk in teltlS ot its success, and in that it has covered ·a far ~er field than has ever bean oovered be£ore, and I !'eel that all.· 

items 'Wel'e discussed with C¢eat trankness and breedor:i. I would :like 

to thlmk a3l. the members 0£ )'O'Ul" ~ on evar.y levGl tor their 

cooperation and personal kindnessJ w have thor~ enjoyed our 

part 1n the discussions and al.so the lighter vein which has been 

introduced fZ'Oill time to t.1.rae. In ewiy discussion we have learned 

a awat deal., and n w:Ul go back home Td.th a lot 0£ iarOl'mtltLon 

Which 'Will be ·wJ.uable to us, and I hops that we have la.ft behind 

samotltlng \mi.ch will be of "Value to you. 

·TOP SECRET 
¥ ------------------

.! "' . ,,, REF ID:A67163 

SECRET • 

IQ> Sam8T 

"1'1ere 1s one aspect i.1hich ha& ~en ~t .,,_,. ~ homB to 

aeo· IlLl2hl we stoo~ :i.n dire li!S9d .of .a combimd cypher machine. . .. 'lb.e ~waa exam1ned and :tt ws tound that the Ue1S. and Br.'!l.t.i.sh'· 

o.f'Ph8r machiue8 ~ h'rGc....U.Sble. alld it was b.v luck tm4 1noo 

eem41f', nthe thdt1 113' fONthouatit, that. the cma ·wbich n h£N at 

tbifl moment was deviaed and ma vsed almost throudlaut the war. 

It uaa, honeve, a macllins d1ich wa 1aa secure than the ~e.ah 

an4 u.s., Haticmal Il1chiiJes. ·H~ made those 1'SD81'ka, 'Which mlght. 

aeer:L ~' I would l1ke to ~ that that mmdline Tlithout 

a dmbt was our salvation. In 1950,; •have had the Br!.tisb and. 

u.s. OoammicatiOns Sec1irity' Ccmterencs, am once more we f'J.l1d 

that in reapa~ to ecm of the item. d.18cussed, dewl.opment by' tbs 

Br'J.tish end u.s. ·baa r9acl1ed a~ where i-econcW.aticm of tir.a 

raohines · u· .tbey' stand 18 cOlng to be extremely' clif'fioul't. '!'he . 

leeaon I have leaaied 1s that if u are g0ing to achiwe satu-

.tactor.v Qombined. cm:iunications,, ~should have N~ and trequent discussions ~ theae. matters before designs sre frozen and moditic11-

tion bacmnea impossibla. 

"I think I b~ notbine else to say other than to thank ;vou tor 

your personal ld.nd.noSs. We look .f'omszd to havina you join us :In 

London next 7•ar11 and n hope that we cm reciprocate 1n some 1117 

the kindness 'Which we have recet ved at yo'Ull" handso11 

.ADLIIRAL S'lUHE thanked ?.Ira lfi.llor for his rema:ncs, ·and said t.bat he 

wuld J!ki9 t6 a.preaa his appreciation to all merabera of the lh"it:tsh 

'teamo Ile expressed regret th.at the an.tire lll'itish delegation could mt be 

present at this· final Session, and asl<Dd that ?Jr. UUler conve.r to them 

tho best '7iahes of tho UaSo dalesates •. 

AD!!IRAL srorm than asked for 111\V' tm-ther comments. 

~~:none, and the Ueeti.rl8 was declared &djou:m.Gd: at, l535. 

TOP SECRET 
REF ID:A67163 

SECRET • 

le AppNVal Of the Rspol't to tbs U'.So and Brl~ Joint Chiefs of 

SWI bJ' tale BmJSA Ool'J!!md.~on SecNri.'t7 Ccmference. 

SECRET. .• 
•• 

SUBdBC!a BDA Ccma11doatia had.tr ~ 

fOa 

~ 

lo 'fhe olold!lg Caiid.Dfd ~ ot • BUA Ca111111Em408Mma Sccad.'1' 

wll1 be hel4 in RDca 1212s lla7 Saearl.tr 8'at.1.ono G 1500 

cm M*W~ :Jf1OchbGitr19500 . 

2o Die tollcad:q ad.te4 Statae pel'aDD91 111'8 tari.W to a"'8ml 

this .nmg. 

PLDARr cxum'J:ll 

Rear Admiral. Barl Eo Stcme,o usr 

ik\1m" Gmeral ·Bo Bo lllOJ.U.11114,, 18.AP-iColmel s. Po Co'llbo8 Ull · Captdn J ....... 1111' · Col«m'l Re a. LJrm., ma 

SERVICE CBlP'lOU)E AODUliS . 

Bri.pdt.er Oarneral 1filliam l'o 01~9 'USA + 

Capfain Le s. lloRretb, tB1' . . Col.met QrwllJe J. ~ lB.AI' )(.. . ~ 

BXECftDIB CCllHI'.ffBB 

llfo 

~ 

'1'0 'lo MedmaD 

s. o. Bmaen, um 

Cmpba1n Jo Sa llarpa:r1 .1811 

Colcmel ~ Co Sean- USAl' 

Lisutmmt Colonel R, Ro Borkma mA 

Si.CBE!ABIAi 

~" Jo 'l'o Peaaan, 1IU 

Hi'o Bo De Janas 

CHAIIiWf,, SUBCmlll1HBI A 

C&ptdxa Lo l'o Sat.f'cllf4., 181' 

CBAJ:RillAW, SUB<X>llllrfm I 

Dl'o Ao tin1m'cr 

SECRET. 
•• 

12 October 1950 

SUBJ'ICT: BRUSA Communication Securi t7 Conference 

TO: Mr. W. F. Fr:Iedman 

lo The Combimd Encutive Colllliittee Mastins and the closing 

Combined Plenar7 Seee1on of the lmtSA Communication Secwrit:' Conference 

scheduled for 1000 and 1100 hours, reapect1'Y81J, Friday, 13 October 

1950, have been postponed until ao:mat~me after 23 October 1950. 

. 2. Information regarding e. new time and date v111 be furn1eheci 

ae soon aa available. 

~~a:2~~ WILLIAM P. 1RIEl»W'f, 

Chairman, Encut1Te Co1111l1 ttlle 

SECRET 
-· ~:e:_·.!D:A671~ a 

• SECKtl •• 

5 October 1950 

SUBJECT: BRtJSA. Ccmmunication Securit;r Conf'erenceo 

TO:· Individuals listed :ln paraaraph 2. 

l.a The closing Combined Meeting ~ tm BR{JBA Communication Security 

Conference will be held in Boom 1212, Na-q Secur1t7 Station, at llOO 

on Fridq, 13 October 1950. 

2. The tol.J.ov1ng United States peraarmel are invited to attend this 

meet1Dg. 

Rear Aclmiral Bllrl E. Stom, lJSB 

MaJor General H. M. McClelland, USAF 

Colonel S., Po Col11ns11 tJSA 

Captain Jo N. Wenger, USif 

Colcmel R. II. IJnn, USAF 

SERVICE CRrPl'OLOGIO AGENCIES 

:Brigadier General William N. Gillmore, tiSA 

Captain L. s. Howeth, tJSlf 

Colonel Orville J. Laird» USAF 

·im:cu:rIVB C<>*IT'l'IE 

Mr. W. F. Friecbnan 

Captain B. o. Hansen, USN 

Captain J. S. lfarper, USN 

Colonel Ro c. Soars, USAI' 

lj.1eutenant Colczel Bo Bo Borton, tBA 

~T 

Lieutenant J. W. Pearson, mN 

Mr., Ha D. Jones 

CBAllMAI, stJBCOll!4ITTD A 

Captain Lo 1. Saffard, USN 

SECRET 
, .. .... , 

~REF~IP: A67163 

ee e • l-Ira Friedman 

S5n1ml' <l Satfard 

~ fml' 

Jalle.t <1 BGrl8tb I 

fa 

Pa1l8l'4 It 

ftltasan 

If J :1 ., 

it • i 

l:Iam..ealli ns 

!Wr!1l • ! 

Ball 

1bl'per 

Sean Hansen 

Seating arrangement for the Plenary Session, BRUSA Communication Security 

Conference, scheduled for 1100 hou~s, Friday, l' October 1950. 
•• ~F ID:A6716·~-~ 

s E c R ET . . . f:)() I 

Schedule of Meet1nsa for th9 Week Beginning 9 October 1950 

MoJlda7, 9 October 1950. 

lOOC MeetiDS of Subcammi ttee A. 

1330 Continue :meeting ot &.ibcommittee Ao 

Tueeda.J, 10 October 1950. 

1000 Completion of discussions and drafting o'l rsporte b7· 

SUbcommittee Ao · 

1330 Completion of discussions and drafting of reports b7 

SubcOJID'Jl1ttee Bo 

• 

Weinesclq, ll October 1950. 

0800 'l'.n>iDS of reports. 

1400 Executive Committee meeting to consider the reports ot 

Subco:ma1:tteea A and B.. Meeting in Room 12126 1'&"7 

Secu:rit7 Station. 

~acJQ 1 12 October 19'0 

1000 Emcut1Te Committee meeting_, if required. ~tins in 

Room 12121 l1&V1 SecuritJ" Station. 

1300 Re'Qp:Lns ot final reports. ~ 

J'r·).d&J, 13 October 1950 

100() Executive Comittee maetq to approve final rei>orta, Room 1212, 1'1a."J' Seourit7 Station. 

llOO l?leruM."7 co~ttee meting,, Roam 1212, Ba'IPJ' Securiv station. 

SECRET 
5 October 1950 

SUBJECT: BRUBA Communication Security Conference. 

TO: Individuals listed 1D paragraph 2. 

1. The closing Combined MaetirJs of the :BROSA Communication Secur1 t7 · Conference will be held. in Boom 1212, NaV7 Securit7 Stat'J,on, at llOO 

on Fricla7, 13 October 1950 .. 

2. The fol.'i..oving United States personnel are invited to attend this 

meet1ng.. · 

Rear Mmire.l Earl E. Stone, '08B 

Ma.Jor General Jr. M. McOlel.land, U3AP 

Colonel s. P. ColliDS11 USA 

Captain J. 1. Wenger, mm 

Colonel R.H. Jirm>,, lJSAF. 

SERVICE CRYProLOGIC AGENCIES 

:Brigadier General Will1am N. Gillmore, VSA 

Captain L. s. Howeth, tJSB 

Colonel Onille J. Laird, tJSAF 

nma.rmc~ 

Mr. w·. F. Friedan 

Captain H. 0. Baneen, USN 

Captain J. So Bar:per, lJB1V 

Colonel :e. c. &aars, USAF 

Lieutenant Colonel R. B. Jtorton, lSA 

SRUR&'J.'A'RIAT 

Lieutenant J. W. Pearson, USN 

Mr.. B. D. Jones 

CHAIRMAN, SUBCOMMITTD A 

Captain L. F. Safford, tJSN· 

CHAIRMAB 1 StmCOMMITTD B 

Dr. A. Sinkov 

C~Jvv.a..._3~e~ ~ F • l'RDDMAI, . ... ~ Cha~, Executive Conmdttee 

SECRET 
-~ 

- - REF ID:A67163 •• 

TOP SECRET 

~ SeptedleJ:' 1950 

Subjeotc 1'1rltatiw Minutes of' tbe First Kee1Atng,,. 

lo b subject .:minutes are toftarded he:rew:l th ftr 70D1" 

conslderatiano · 

2. Ple&se ad'Vise tb8 ·Secretal'iat, located 1n Roca 2111 

Building 191 u. s. Nav S3C1Jftt;r Stati.cn, telaphcme extenal.on·~ 

J.548 ot 7f1a OOD11DeDta 8a.d/,. concm"l'91lce. 

~~ J • W • PEABSW 

Ho Do JQUilS 

Secretariat 

TOP SECRET 

13 
-· REF ID:A67163 •• 

·rep SECRET -

BRITISH - UNITED STATES COMMUNICATIONS SECURITY CONFERENCE 

MINUTES 011' 

THE FIRST ?Sh"TING OF THE PLENARY COMMITTEE 

The First Meeting of the-Plenary Committee of the British - United States Communications Security Conference was held at 

·1430 on 21 September 1950 in Room 1212" U o So Navy Communication 

Station, iVashington, Da Co · 

Representatives Present 

United States 

J.ear Admiral Earl .ll! o Stone, USN - Major Genere:l Ho Mo McClelland,USAF Brigadier General ,_.lo ~o Gillmore,USA 

Colonel R,., H·o Lynn 9 USAF 

Captain Lo S., Howeth!) USN. 

Q..olonel Oo Jo Laird, USAF 

vColonel So P~ Coll1ns 9 USA 

Captain Lo F o. Safford, USN 

Captain Jo I: o ·,fenger 11 USN 

Captain J. So Harper 11 USN 

Colonel Ro Co Sears 9 USAF 

Captain Bo Oo Han~en9 USN 

Lt., Colo Ro Ho Horton11 USA . Mro '.'lo F o Friedman 

DrQ Ao Sinkov 

United Kingdom 

?fro ToRoWo. Burton Miller 

Captain, the Earl Cairns, RoNo 

Mro Kenneth Perrin 

Mro J.MoGo Pollari 

Lto "Colo Co Ao Henn-Collins 

Mro Eo Ho· Jolley Brigadier Jo B~ Tiltman 

Group -Captain Benjamin Ball, RAF 

Commander JoRoGo Treohman, Ro No 

Secretariat 

Lieu tenant J. ·,yo Pearson., U. so N. 

Mr. Ho Do Jones 

W.iss Catherine Mo Johnson 

TOP SECRET 
AE>MIRAL STONE opened the First Plenary session of the Bfit1sh - United States COIDClunications Security Conference bt welcoming the British Delegation on behalf of the Uo So Represen-· tatives Stating that this Conference was another link in the 

chain of friendly U. So - British relations, Admiral Stone emphasized the advantages ·of collaboration in the vitally 1~por~ant 

related fields of Communications Intelligence and Communic~tions Security 8 and remarked that this Confer~noe represented a further 

step in British-U.So collaboration in that it was concerned with 

Communication·seo11rity developments of a rather wide soopeo He 

continued by stressing the importance or combined communications 

security, and stated that all concerned were striving to ass~re 

the maintenance of udequate·security in combined communications 

on various levelsn He added that it was his hope that collaboration would ·do more than to ae~l.lre the maintenance of adequa.te · security, explaining that in the reciprocal exchange ot c~yptographic 1ntormat1on,· the United States· Technical Rxpertsa al~ 

though feeling· that they had much to off·er, knew that they would 

gain much us.eful technical information from the exchange wi~h 

their British colleagues, and further that such information 

should have beneficial effects on the security of purely UoSo 

Oommun1cations 8 and ~hat reciprocally, it was hoped that whateve.r information Uo So Technic1.ans could provide 8 would prove beneficial to the security of purely British Communicationso 

Concluding his remarks by expressing the hope that the 

visit ot the British Delegation to the United States would be 

a. pleasant one 8 Admiral Stone invited th~ members of' the Delegation to call upon.him for a1l3' personal assistance that he. · might be able ~o rendero lie then invited Mro Burton Miller 9 Head of the British Delegation, to address the Conference;. 

MRo MILUR, ·speaking on ·behalf ot the British Delegation, thanked Admiral ·stone for his words of welcome, ·stating that 

they had been looking forward to their visit, and to getting 

on with the discussion of the items on the agenda~ He re= 

marked that discussions on some ot the items had.been held 

before. and that they had proved very prof1tableo He stated 

that one or two aspects had presented stumbling blocks, which 

had been satisfactorily removed, and therefore.he saw·no 

reason why decisions could not be reo.ched at this time on 

which both parties could build and forge aheadQ He pointed 

out that notwithstanding the name "Initial Exploratory Conference"• he felt that decisions oould be reached on certain 

items which would be or mut~al benefit to both parties, but 

that much benefit could be gained from exploratory discussions 

ot other items on which firm decisions could not be reached at 

this t1m.eo Stating his desire to make the maximum contribution 

during· the deliberations and discussions to follow, Atro· Miller 

co.acluded his remarks.(> 

• 1 ~-

TOP SECRET 
ADMIRAL STONE thanked ·Mrp Miller 9 and.invited General 

McClelland 9 Diractor 9 Communications-.~lectronics and Chairman 

of the ~oint Communications-Electronics Committee 9 to address 

the CoD.terenceeGENERAL McCLELLANDv extending additional words of welcome 

to the British Delegation 9 recalled that since the establish= 

ment of his officep approximately one year ago., he had noted 

increasing collaboration between the Ua KQ and the Ua So 9 · 

·/ 

particularly with regard to the Military· Services o_f the tw:> 

countrieso In explaining the functions of his office 9 Genera.l 

McClelland stated that it had been established under the Joint 

Chiefs of Staff to.provide overall coordination ainong tha communications~electronics activities of the three Serviceap . and that control and· supervision was vested in the Joint Com- /· j; ~1nications~lectroni.¢ Committee which operated s1.milarly to · BJCBo He continued oy saying that the Joint Communicatio'lSElectronics Committee was a completely integrated organization8 

having two Colonels from the Army 9 two Captains from the Navy 9 

and three Colonels from the Air Force; he emphasized the fact 

that his own position was co.mpletely neutralo 

j GENERAL McCLELLAND pointed out that the D1rector 9 Coll".muni= 

'1/ cations~Electroni"cs also served as the Chairman of the Joint 

.,/ Communications~Eleotro~ics Committees the Chairmanship being rotated among the three Services every two yearsn He remarked 

that a great deal had been learned from the British during the 

';'lar concerning Qormni ttee Government 9 particulal".l.Y the principle· of unani.m.ous dec1sions 9 and that while· he had the .. authority to 

/

resolve a split vote~ it had never been necessary for him to 

do soo He concluded his· remarks by pointing out that the Joint 

Communications-Electronics·commlttee had a responsibility to 

the Armed Forces Secu,rlt,y.Agency in that it \Vas charged with 

providing communications for that Agency 9 s communications 

intelligence activitieso 

ADMIRAJ ... STONE thanlced General McClelland 9 and: stated that. 

the Conference had progressed to a point at which he thought 

it would be appropriate to select a Conference Chairmana On 

behalf of the United States Delegation9 Admiral Stone stated 

that he was pleased to offer the Chairmanship to the British Delegation~ . 

r.J!Ra :riiD:LLER 9 ·thanking Admiral Stone for his offerb ·commented 

that he was.not sure if it would not be advantageous to have an Am~rican Chairmano 

ADMIRAL STO?lE replied that the American Delegation would · be .very happy t·o have the British· p1•ovide the Cha1rman 9 particu-= larly in the person of Mro Miller~ · 

.-

"'' 2 ... 
-~. ~[ J.P....;~62163a a . p O)l:Ll<I: I .,., 

MR~ 14ILLER stated that he was happy to accept the 

Chairmanship., 

Before turning the Chair over to Mra Miller, Admiral 

STONE said that there were several matters that needed to be 

covered; he requested Mra Friedman to .present a statement 

setting :f'orth information that would be useful as background 

tor the Conferenceo I MRo FRIEDMAN stated that he thought it necessary to in- . vite the delega~~ attention to the fact that· there are in 

existence certain agreements between the United Kingdom of 

'Great Britain and Northern Ireland and the United States 9 and 

between the U o Ko· Chiefs Of Staff and the U o So Chief's of 

Staff' with regard to ("l) sec11rity measures for the protection of classified military intormation disclosed by or exchanged between the two goverilments 9 and (2 >. arrangements for the 

protection of the rights of inventors of equipments disclosed 

by or excha.aged between the two governmentsn 

\j\~ ~U:)·the c:;e!~::!m!!~nr:::~d~!: ~~!:~i~~r!!~e a::!~!::n~;om which entere~ into force on 27 Jan11ary 1950: 

"Article. V 

"lo Each contracting Government will take such 

·security measures as may be agreed in each case between 

the two contractin~ Governments in order to prevent the 

disclosure or oompromise or any classified military articles11 servicesp or information furnished by the other 

contracting Government pursuant to this Agreement 0 

"2o Each contractin ~ Government wi"ll take appropriate measures consistent with sec11rity to keep the public informed ot activities under this Agreemento 

"Artie le VI 

"lo The two contracting Governments will negotiate appropriate arrangements between them respecting res ... ponsi bili ty for claims for the use or inrringeme~t of 

inventions covered by patents or patent applicationsr trademarks. 11 or copy rightsp or other similar claims 

arising from the use of devices 11 processesn or tech~ 

nologioal information in connection with equipmentD ma~erials 11 or services furnished pursuant to this Agreement, or furnished in the interests of production undertaken by agreement between the two contracting Governments 

in implementation of the·pledges of self-help and mutual 

aid contained in·the North· Atlantic Treaty .. " 

- 3 ... 

TOP SECRET 
•. . ..... -- REF ID:A67163ee 

fOP SECRE1~ 

Continuing his remarks 9 Mro FRIEDMAN pointed out that it 

was assumed that this Conference would take cognizance of the 

foregoing article~ in the Uo Ko = Uo So agreement 9 and that the 

representatives of the respective Governments would govern themselves accordinglyo He emphasized that in order to be on 

the safe side9 it was to be understood that all information 

disclosed during the Conference would be regarded as classified 

information 0 regardless of whether such classification is in 

the military sense or in the sense of "Confidential" as used 

in the processing of patent applications through the Patent 

Offices of either or both governmantso · 

MRa FRIEDMAN concluded his remarks by stating that Admiral 

Stone had designated Lieutenant Pearson as his (Admiral Stone's) 

representative to receive requests for any written technical information or drawings which might be desired by the British 

Mission 0 and that such data as might be available would be trans-· 

mitted from Admiral Stonees office to the Head of the British 

Missiono · · · 

ADMIRAL STONE said that he would turn the Chairmanship over 

to Mro Miller at this t1me 9 stating that he would be pleased to 

assist the Chairn1an in any way· possiblec 

MRo MILLER replied that .upon reflectioni he felt that it 

would be better if Admiral Stone assumed the Chairo 

ADMIRAL STONE stated that he would be pleased, and if it 

were agreeable 9 he would take the Chairo He suggested that it 

miBht be well at this time to review the Conference Agenda~ explaining that it was comp·osed of two 'parts: (1) Replacement for 

the Combined Cipher Uachine 9 and (2) Exploratoryo He pointed 

out to Mro Miller that he had altered the order of the items as 

a result of their discussions on 'Vednesday 9 20 September 1950., 

MRo MILLER repli~d that the order of items on the Agenda 

was agreeable to himo 

ADMIRAL STONE continued by saying that as had already been indica~ed 9 U,, S., Authorities hoped to come to some specific understanding on the first item on the Agenda 9 nnd that he had 

designated Captain Satford9 UoSoNa 9 who had had a great .. deal of 

experience with the seven rotor BCM9 to be his representative in disclosing and discussing that machine~ He suggested that 

if it were agreeable to the British Delegation~ he would set 

09309 22 September 19509 as the time tor showing the seven rotor 

machine in Room 319 of Building 179 stating that the Uo So 

Delegation were prepared to spend the remainder of the morning discussing the mach1ne 9 and at the pleasure of the British 

Delegation9 the discussion·s would be resumed in the a:f'ternoono 

He inquired ot Mr~. Miller if the foregoing proposals were 

agreeableo 

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MRo MILLER replied in the affirmativea 

ADMIRAL STONE remarked that it might be possible for the 

Conference to proceed on Monday of ·next week with the explora= 

tory discussions 9 pointing out that Ua So Representatives had 

prepared a suggested form9 Enclosure A to the Agenda 9 which 

showed the scope of the discussionso He inquired if the Agenda with Enclosure A were generally satisfactory t·o the British 

DelegationQ 

MRo MILLER replied that the Agende. 9 with Enclosure 9. was 

-satistactory 9 stating that they had already had an opportunity 

to study some of the.problemsa He explained that one exhibit 

and quite a number of papers were supposed to have come over 

with the British Delegation on the ~ueen Elizabeth 11 but pre1m.ut 

in1ioations were that they had not een aboard9 however 9 he 

added8 he had taken steps to have them dispatched as soon as 

practicableo 

ADMIRAL STONE stated his appreciation of the situat1on9 

and added that perh.aps it would permit the British Delegation 

to remain in ·.'lashington longer than had been anticipatedo Turning to the next item of the Plenary Agenda 9 he ·proposed that the matter of Committee Structure be considered next~ 

He observed that a paper 9 indicating the Uo s .. representation 

on the Plenary Committee 9 Executive Committee 0 and Sub-Com~ 

mittees A and B~ had been distributed 9 and suggested that it 

might be advisable to ascertain the names of the British repre~ 

sentatives for the Executive and Sub-Coa~ittees at this timea 

With regard to the selection of Chairmen for the several Oomm1ttees9 Admiral ·stone suggested that the British Delegation designate the Chairman for the Executive Committee and subcommittee B9 but stated his preference for retaining Captain Safford as Chairman of Sub-Committee A9 in view of the fact 

that the United States was the disclosing authorityo 

MRo MiLLER indicated his agreement to Admiral 'stone's 

suggestion8 stating that his delegation was so s.mall 9 they would work as a team on .most of the itemsa He stated his 

preference for restricting British membership on the Com= 

mittees to the Delegation itself 9 reserving the privilege of 

calling in various British ,..esidents of ~·1ashington from time 

to timeo 

Indicating his agreement with Mro Miller's remarks~ Ad= 

miral STONE said that he, assumed that the full British Dele= 

gation would be a part of the Plenary Committee 9 unle.s$ Mr~ 

Miller would P!efer some other arrangemento 

MRo MILLER replied in the affirmativeo 

= 5 "" 

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a. J:iEF _rp ~§7_1~3 a a 

• 9._, ~t:L~I:: I •• 

r ADMIRAL STONE announced that there would be·a meeting 

ot the Executive Committee immediately following the Plenary Meeting at which time the times and places of future meetings could be arrangedo Turning to another subject,.he recalled 

that the matter of standardization of rotors had already been 

mentioned in a paper which had been forwarded to the British, 

and that U. So Authorities were of the opinion that the inter~ 

change of rotors on-whatever machine is agreed upon tor com= 

bined use was of utmost importance; he proposed therefore 9 that the subject ot· standardization of rotors be included in 

the discussions on the .replacement of the Combined Cipher llachineo 

, MRo MILLER agreed to the proposala 

ADMIRAL S'l'ONE then requested Mro Miller to act as 11 or 

designate. the Ciha irman ot the Executive Comittee 9 ~t least. 

on a temporary basisc. 

MR.a MILLER· replied that he himself would assume the Chaj.r- manship of the Executive Committee, at least for the Meeting tOd81' o 

ADMIRAL STONE inquired whether there were any further 

comments to be made at this timeo 

CAPTAIN HOWETH stated that he would like to take this 

Opportunity Of welcoming some of his old friends to '.'/ashingtono 

ADMIRAI, STONE introduced the members of the u. So Delegation,. and welcomed Group Captain Ball and Commander Trechman to the meetingo He stated that Mro Friedman, Colonel 

Collins 11 and Colonel Lynn would be his representatives at 

the Meeting of the Executive Committee to followo 

The meeting adjourned at 1456~ 

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REF ID:A67163 

' -"f)fjice Memofandum • UNITED STATES GOVERNMENT 

TO 

FROM 

SUBJECT: 

AFSA-14 

DIRAFSA 

DATE: 2.4 August 1950 

u.s. - British Conference on the Exchange of Cryptographic Principles 

on a Reciprocal Basis (AFSAC: 63/1) 

Please draft appropriate opening remarks for liij"' use at subject conference. 

URL B. STOD 

Rear Adlli:ral. U.S. 1'a'IJ' 

l>il'eot.or, Ane4 )'.oroes seourit'f ,___, 

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• 

DRAFT 

It ia with a great deal ot pleasure that I nleou the Br1t1•b 

Deleaation trcm GC"!lQ t·o the _'O:n1te4 State1 and to the Armed Force• 

Seaurit7 Agency. I am aure 7ou are all aware ~ thi1 1181' _.Aganay, 

. . 

which •• cr•t•d a little oYer a year ago and hall brou,1ht about a 

further integrat1on or the aryptolo;:ic operation• conducted h1 and with-

. . 

1n the ArMd i oroe• . of· the Un.:lted Statea. In W11ng the word CQJ?tolog1o 

I •ean t.o inO.icate that '18A 1• now in a po•it1on to deal with the 

whole co1n1 one side of which. represe'!lt1 the comuniaatios:i illtelllgence 

act1•1tiea, the other, the aOllliun1cation eecur1t7 act1Tit1ea of the 

.&ned loroea ot the Unit.ct ertatea. 1W·SA 1a1 in tact, now an orpniution 

:rather aim_ilar to GCHQ, which w, on thl• aide ot the •ter, haYe alway• 

adaired tor its gr•t acoC111pliahaents tind .uoe•••• throughout the para 

ot our aaeociation. 

Britiah•U.s. ooJ.laboration in the oOJ1lmunication ~ntelli1•nc• tiel4 

· •• ••1'1 .c.&.oae during World lar II, eo cloae, ln fact, that ita bene1'1o1al 

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re•ult1 repreaented·a major contribution 1n the auoce1aful outcoae 

ot that •r. The detail• ot that atof7 are prett.7 wll known to all 

ot ua her• todq and need not be elaborated on at th19 tlllle, mccept 

to •&7 that the oloH -~time oollaborat1on ln that !1eld ha.a been 

ext.1nded to our preunt ao-a.dlecl peaoe-tille. 

. . . 

Alao during World War II, there •• Brit1•h-U.s. collaboration 

in the ooaunioat1on aeourit1 tield, a no le11 iaportant aot1ritT,. 

and in aame respect• nan more -important t..han th9 COUIB1', or, aa our 

Britiah ftiende aq, the SICill' field. The collaboration •• not 

aa oomplete, perhap1, •lnl• it involved l'or the most part onq the 

aeaurity ~ higheet•level Coab:lned COllllDWlicatlona. But, again, llUCC811 · . 

greeted our Combined ef'forte, wen though it might haTe bnn noted ill 

leas spectacular faah1on. 1~h• pre1e11t Conference repreaent• a further 

1tep .tn 7!rit.1ah•V.s. collaborat.ion in t.he tield ot oryptolog:r, tor 

1t ia devoted to caaunicat:lon ••curit7 11&t.ter• of falrq wide·ecopa. 

lot o.n.q will there be cl1•cuaa1oaa on Combined COllllWlicationa ot tbe 

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_ ~£~£1-

hi&he.t lnel, and apecU'ioalq on t.he COM, but al•o •• expeot to dllCNH 

Coabine4 eo-un1catlona ot_all lnela and to go. to a.certain extant. lnto 

the 1eneral £1'eld .of 01"l'ptogra1>hic principle• to include tho" underq1n~I 

_other typea of litel"al oipher •chinea, aa well a1 ci(Jhorw and cltax 

devioea. Not onq are the u.s~ repreaentat1Ye1 prepared to d1acua1 th••• 

1ubj•ct• but-.alao t.he7 will be glad to ·d~on11trat• oerta1n d•ice1 ~ 

the tol'll ~.final equ1pmenta, or engineerinc·•od•la, or ~read.board. 

. . . •odela. of certain new e«lUiPHnta. 

:tn th• u. S. Ar_.. Foro•. the queiltion haa otten ariaena whioh 

. . 

1• th• 110re important. ·or the two close~ a11oc1ated 1epenta of CJ'1ptologic . . ·. . . 

·aa1ence -· comauniaation intelllgenoe or. c<J1Daunloation.eacurit1? Wo~kera 

•rs ·Ned in the former naturalq re ::ard their field u paramount a thoae 

. . 

•naaaect· 111 the latter regard ·their. own a11 beiq t1rat in illportanoe, 

&nd no uount.e>f argument.will cODYinc• th•• otherwise. liowner, 1t 

bUked into a corn•r, the COll11' specialist• •1U ad~1t. that ·ahould 

-~tera ..-er come· to ao •~1oua·a er1918 that a dec1eion would haT• to 

b• aad• to abandon one 'or the other' 8\':ti't"ity, tbq .reel sure ot 11hat th• 

' ' 

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an•wr would be, and thq would. reluctantq tuld up their tenta. I 

have no doubt aa to mere the members or .the Brit11h ~elegation 1tand . . . . . . 

on that question. I will U!m1t that in 11\Y position.it is ao111eti111•• 

· ditficult. to in&k:e a decision ba1ed on the relative importance of.the 

. . 

two, ::-.t in the preeent instance ·1 t'eeJ.. t.hat •• are all of ·one rdnc!. 

un the •W:ety of' our COP'.J&W.iJ.cations llee "!ot only t'tte eU'ety of . our . . 

COllilT act1vit ~ee,. but alao the eecurltY: of all ottr Btrater,ic and 

. tactical mil1ta17, .naval, and air· piane and operation•, the aatet7 · 

ot our own A.med f'orcea, and hence the ·aeourit7. ot our Go'rernriaente~ . 

We hope neYer to be 1n a pos~tion.wh~re, in torthri ... ht parlance, 

•telegt"aph1ng our punahea" i•eault1 in the lo•• ot· a lit~, a battle, 

a campaign, or a war. Of cc;une, n in the 017Pf.olog1c ·aervice do 

not have the eol• reeponelbWty in that re,rd, becau9e t,h.e caumandere· 

·. ot furcea afie~, atloat, and in the alr are the actual. users of the 

. . . 

equipment. v.11 conoeive, design, and proYida. Their• la· th• :reapon11b1litt 

to ••• that· the equipment is used proper}T and eff1cac1oual.J• But we. · 

aannot dodge tha·responaibilit7 of prcw1d1ng adequate aecur1t7 together 
. .-.. ../ 

with -.z1aua operabUit7. When .. ha•• done t.h.at, then and onq t.hen 

oan our conscience• be ci.r a• regard•- our re•ponelbilltiea in the 

matter ot cOlllllRlM.oat1on •ecu:rit7 •. 

. The praaent Conference 11 a pralilllinary at.ep in paving the wq ~ . 

toard achi.Viug. au.equate ae~itl' 111 Co~bined COMUD1oat1ona ot 

. .. . 

variou lev&ls •. ·But. I hope that it will do more than that. For 1n 

the reeiprucal exchqe ot Cl'JPtogi-apbic principles the United Sta.tea_. . . 

technioal experts, althou...~~1 t~".l•.Y J.eel t.hat thq baY• muc'1 to oH'er, teel 

. equalq · aura t.heit they- can nnc1 will. :Jain mu_r.h uaetul technic&l intona-

·.·. . . . . 

tion from their British oppc>81te numbe;l'a in the di•cuaa1ona. ~c~ 

info~t1on w~ll haY• bene.ficial etfacta on the ••curit7 of pun~ 

U.S. cOl'Dlllunication1 and, rec1proc~, we ~ope that auch information 

aa_U. s. technioi&nl aan provide will prove beneficial to tho security 

ot. pureq _8riti1b .-aioationa •. Thu1, w will all benefits u.· S. 

. . 

communicatiuna, Briti•h c011municat1:-;ne, · and Coabined o01111Unicat1ona, 

·.r111 all be imprond. 

Betore proceeding further \';1th Conference 'bu•ine•a, I • Al'• •• . . 

would. all like to hear trolidlr. ~11ller, the Chief of the British Delegntion.-

:,,t~--~~!'r~.:;~:.S · 
~ -;- - - - .- - - - - ------------ - -. - - - -REF -!ff: A67163 

;. 

.. ... •? 
l.S September 1950 

SUBJECT: BRUSA Communications Seeurity Conference 

TO: Individuals listed in paragraph 2. 

1 o· The opening Combined Meeting of the BRUSA 

Communication Security S·eouri ty. Conference will be 

held in Room 1212, Naval Communication Station, a.t 

1430 on Thursday, 21 Sep·tembe·r 1950. 

2 o The follo\"ling United State·s personnel have 

been invited to attend this Meeting: 

Rear Admiral Earl E. Stone, USN 

Major General H. M. McClelland, UBAF 

Colonel S~ P. Collins~ USA 

O apt a in J ~ N ~ Wenger, ~USU 

Colonel R. Ho ·Lynn, USAF 

\Plenary 

( Commi tte_e 

J 

Brigadier General William N. Gillmore, USA't · Serviee 

Cap·tain Lo S •. Howeth~ USM. . )c-C'.ry!Jtologic Colonel Orville J. Laird, USAF ..J Agencies 

Mr. w. F. Friedman 

Captain H. o. Hansen, USN 

C ep·ta in J". S. Ha1•per, USN 

Colonel R. Co Sears~ USAF 

Lieutenent Colonel R. Ha Horton, USA 

Lieutenant J~ w. Pearson. USN 

Ml". R. D. d'ones 

}

_ Execu:iiive 

Comm.5. ;;·tee 

· >Secretariat 

Captain Lo F. ·Safford, USNs Chairman., Subcomm:i. ttee A 

Dro A. Sinkov, Chairman, Subcom.111it~ee B 

Q<l~~ W' e F o ·FRIEDMAN ' 

Chairman, Executive Comrdittee 

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/ 

I 

. _.,._! 

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REF ID:A67163 

'l8P SJIJRM' . TOP SECRET 

DHUSA COMS&: COHFmtl~C! . 

AGENDA }~OR U. S. - BRIT.L«;H CONFF,RFlfCE ON THI F..XCfiAHCm OP' 

CRYP'l'OORAPHIC i'RIHCIPU-3 

a. Spea181 Purpose Teleprinter S11teaa.tor 

the ~hange ot IntelliR9nc• lfate:rial. 

b. Low lchelon (Jllnor War Veeael1) Telep,raphic 

. 5J'1tema. 

c. Merchant Ship 'felegrapbic Sfateu. 

d. Jlet.eorolog:l.cal Securivs,at.a, .Inc1uciin« 

1acaildl.e, TelAprinter and Telegraph. · 

e. Voice Security Syateu tor Tactical 

Punx>a••· 

It is J)ropoaed that each ot the aboh typea of ayet.eraa 

be diacusaed accordirig to the echedule set torth·in F.ncloeure A. 

hereto. · 

,., 

I• 

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TOP.SECRET . . 

!ncl.oaure A 

·I. ~airable Charact.eri1tiaa. 

·A. ·oen.rai 

. l. Objective 

. 2. · TJ'p• _or ··lenl ot lmplo,_nt 

: B. Operational Characteristic• 

· 1. Securit;r · . 

. . 

a. Crn>~eecurit.7 

b. Badiation Security 

c. Tran-.1.e~iC?n Sec~ty 

2. . PUnct.:l_~ RequiNMnt• 

. 3. B&dio Interference 

4. Power Raquremen\8. 

· S. Special Requireaente 

c. Pb,J'aical IJlaracteriaUca 

1. Weight am Voluae Faatora 

• 

2. Operation, 'l'ranaPoi-tatioaa, Packaging 

and Storage ~nae$ 

3. t>eetruction ~equireaent.• 

D. ·.Operation and llainteM.110• Cllaracter1stic1 

ot Equ1saent · . · 

E. Cmd.nt ~oation• with Respect to Oonaecp.1ence1 of Capture of lqqipaent 

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REF ID:A67163. 

tOP SECRET 

II. Preeent Equii-ent - U.S. 

A.· .Demonstration or D••cription 

B. , Diacueaion c·onceming Adequac7 Accordinl . to I (Int.rill, .. long-range, Bllergenc7) 

III. Preaent Equipaent - U.K. 

A~ ·neacript:l.on.or.Kodel Deaonatration 

8. Diacuaeion concerning Adequac7 According to I· . 

IV. Jo!quipmnt umer Develoiaent - U.S. 

A. DeaoripUon or J.fodel Deaonatration 

B~ Adequacy aacsording to · ~ 

C. PreHllt Sta.tua 

. D. Pl.an• 

V." Equi}Mnt under DnelopmaDt - U.I. 

A. Deacript.ionor Model Dmonstn.tion 

B. Adequaq accoftling to I 

c. Prea•nt Statue 

D. Plana 

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. r 

·TUE FI.Fft i£llftl·M OF ~ EXEmJTI'!fE C\OlVIWT'l'EE -

fhs Fifth. l1'!s6tlng ot the ExeGutiva O()lYIDlittee. of the B~itis~ - Uclt$~·sta~®s·commwmicmticne. Seouri~y conterenoe .· ~e .. bsldl ~t 1400 cmi.· 27 Ooto~r 1950 itim Room 121~··9 Uo .. So . ··\qaw7 ~~~~tf StatiOJm9 · Waslli.rngtcn0 l)c, C,, 

Mr Q '.'V' o F o J'riedm.an 11 Chairman 

Rear Admiral Earl Ea Stone 11 ,U oSoN'o 

Captain Lo· F o Saf'f'crd:, U oSoNo 

Captaiim H. o·~. Uauen, UoSo'No · .. Ca,Ptailll!. l.o So Harper, UoSo'No · 

Colonel R. C. SSars9 UoSoAoFo Lt~ Colonel Ro lln Bort1D.o.,·U;,S.Ao 

Lta Colonel Ealao Go Clew, UoSoAo 

Dro Ao SiJ!ILkc'U' 

United K:i.ng;dom 

iiro ToRoVfo Burton Miller 

liro SoMoGo Pollard 

Brigadier J. Ho Tiltman 

Commander J.R~G. Trechllian, 

Secrste.lf':B.at 

Lis111te.aant lo Wo Pearson, 'UoSoNo 

Mro Ho Do Jo.a.es 

M1ss Catherine M.-John,son 

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·-·· ·I... 
l:Tm lo. APPROVAL OP THIE MINUTES OF THE FOURTH. MEET.iNOo 

. &o FRIBDDI .s~.ted:·t~t the min11tea of the -Fourth Ueetins .. : were stil.l .1n. PteP.ar@t;i~.,n and were not available tor oon~ 

··'$1~~.ratio.rnci ne exp,;J.~~O.~.ct: ... that it was reali~~. th~~' this w~uld 

·.b:~· ... il!le case, ·.ho~&~1~(~:t·as· believed advisable··~o .. lnolutde this· "~?~.~ o.m tllhe. aaend~ ... :·f@r J~p@rme of ~eoor4 0 . 

.. . ·-· 

•. . . 

·"· · ·.> .. > .··.': HR .• 'fWmlAH 1·n.~r~mmta fGlll.ie item for c)on1d:cttii·~~tion, eta• 

: · ·· ":;t~:.fag that • probl:~#f ~l?@n. ~ Committee ~-: ··'iiD.iir·:~·t cheoki.ng . ·.,:t.c siae "6t. ~ 1r&W~~·~.@u a~®cl to at tbs J.asi; .. :tft~~~iAS ·had been ·. · .. ..; ·:·recorde>d properl.1 ·iin\. ~ta .~i~ll. paper Which .waa: ilbt11(bef0Jre the · -' ..... ··.pcma!ttee~ H1a aslce.ct.:i~ .... fofll•>members had had an .. opportwiity to .. =:· ... ··atudJr thll!I paper~,~ ._..... ·. · · .· · . . . . . 

· ·: · . . MR., llILLER rep·l1&d !n the e.ftirmati ve and· safd· .that the .. ;:·,.::·<···:1:"~nal vereion met w!:tlD. his approvalo ...... •' . , .. : ·.:<'': . . . 

·. : ... ·· ·. ·. · ·· CAP'l°.AIN SAFPORD expre:as:Sd .his satistact~o.o.. with the f 1.aal . ·: :··veJC1810IR.Q . . ., 

· The CoMi tt~e .. ~~eed ·: ·t·o· approve the Thi.rd Re.po·rt of S~b-· 

Committee A, as ~evi'.sed at the Fourth Meeting .of the ExecutiTe 

Co.mmitteeo 

MR. FRIEDMAN asked tor c.omments on the :tin.al version. .of 

this report, which includttd changes agreed to at the Fourth Meetingo · · . 

DRo. SINltOV said that he had read the final paper carefully to see that the agr·eed changes had been madeo. He added 

that he was entirely satisfied with the papero 

MRo MILLER said that~ he, alao. 8 was sa.t!s:ried with the 

final versiOJlo 

. The Oomm1ttee agree~ to appro've the Second Report ot 

Sub ... Com$1ttee B, as revised at the Fourth Meetiag of' the 

Executive Committee. 

l 

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IBM 4o APPROVAL OJ'. '1"fiE REPORTS TO 'lBI U.S. JOIH CBlEFS Qt STAff lW 'Ml· ·BRITISH Jdffi ciiiifs 1'J S'J!AfF. Bf Tiils 

BkUBl dOIUJticA'i'iOIS siCUR1W doRfERliiOB. 

MR. FRIBDl4AH "i.o.t-rod110.eci the final item tor oooideratioa 

8D.d. aaggeste4 tJU:l~·. the ·two t1nal reports be ooneldered para- · 

8l'Jl.Ph b1 paragrap~.- This au.ggeat1on was accepted and the 

members ·prooee4ed to oo.naldeJ'. the first at two reportsi 

Report on .Rep~acament of the COM 

MR •. ll'RIEllMA.R·read the basic report and Appendix A thereto. 

· After a brief diso11salo11 the Committee agreed to accept the report as !fl"itten1 except tor the following changes on 

page ; (in Appendix 41:. . 

Subparagraph (a). Change to :read aa tallows: 

"(a) 1'h&t there sho1.1ld be 1ss11ed ·20 rotors to the 

set :ror eo.ah existing COM in lieu. ot .Present .uwo.ber ot 

10. This is to become ettectlve as soon as pract1cabl~ 9 bu·t s~ll not precludfl' issue ot sets or· 10 rotors in the 

.interim. Key lists for 20-rotor sets sho11ld be so -pre- pared that no rotor will eTer be effective on two successive days. within the same key lists for eaoh_crypto- channel·!·· so· as ·to· ·permit setting_·up tV10 baskets. for two . success ve d&Ts from a single set of 20 rotors thus ob• · 

vlatlng the need tor duplicate sets of rotorso" 

The secretariat arranged for the immediate publication of a new page 59 1nclwl1.ng the above change, copies· of which 

were inserted·· in all copies or the su.bj~ct. report 1n lieu of 

the existing page ~o 

Report on the Explorator1 Conference 

MR. ll'RIEDUAN then -read, paro.gra_ph by paragraph11 the report on the Exploratory Conference, and the members· noted the. 

prevlouaJ..r-agreed changes wJμoh had been incorporated thereiBo· 

After brief discossion the members approved the.final rec=-= 

port without chaJ.tgeo. · 

. MRo FRllD!IAN asked for a.oy further ·comments on the reports Just approved., . · 

Tll~re were no further commentao ·. 

. . 

URo FRIEmlWI then declared the Meeting adjourned (at lS.10) and announced tllat tllere would be a brief recess betore· the 

final Meeting of tlle Ple11U'7 Commltteeo ' 

2 

TAIL:<\ !Cr DI= T_ 

.r· 

....... · ........ 
"':' .. ,..... 

•• 

For the 11ftrh meeting to be held at 14001 71 Ootobar,19~. in Room 

1212 IAVSEm!A 

1~ Approwl of B/l1mJtea of 1ourUl lfoetlng. 

4o Appl'OV'al ot the Report. to ·'bile U.So and Bri.Ush Joint Chief's o~ 

Statt by t.m BHtBA Cminmioatlon Secmri:f;J' Cc:mtenm.oe. 
- . 

. 

JRI'TISll ... :mn:m §'l'A°l1S OOMrlJHIOA!IORS SIOVRI!t oor;rmum91 . . I . . . . 

· MI\IJTIS OF 

Tm Foartia M®et.!.aig of thiD Exeoutl'fe Committee. ot ·the 

British = 1JB!itfl4 States Commwlloatlons Saoarlty Oonf'ere.noe 

we held at 1400 c~ VfeclRaGis4a.re 25 October 1950 in Room · 

12121 v. s. Nav:. Seouri~J S~atioa9 Washington, D. c. 

IJeDnaeatatins Pres.ent 

United States United Kipgdoe 

Kr., ·'• Fo Frleclman, Chail'Dlall lfro T.R.W. Barton !4111er 

Rear Admiral ·.Earl ·.lo Stoae 1 U.s.N. Commander 3' .R.G. 'l'reohman8.· R. N'o. 

Captain L~. F-C'. Safford, 11.s.s. 

Captain J. s •. Harper• U.S.N.: 

Colonel R. C~ Sear~,· U.S.A.FJ. Capt~a·s.·oo·U84&8.ll 9 U.S.H. Lt~ .Col. IC. Go .-Clow, .U.S.A. 

Lto Col. Ro Ho Horton, 11oSoAo Dr~ A. Sl.nkov · 

secretariat 

-Lieutenant J. ~'I~ Pear.on, u.s.N. 

Mro H. 'Do Jones 

Miss Catherine Mo Johnson ·. 

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l'l'IM l.:i APPROVAL OF PINAL MIRUTES OF THE '!'HIRD EXE"OUTIVE .. .cotMg gem~ . . · 

Prior to oons1deration·ot ~he· t1rst 1tem oo the agenda, 

Do PnIEDMAN weloom~~ L.ie11t•.P&A1i Colonel Y.elso G~ Clow, ·Senlor Uait-4 Statea·u81aon Oftl~er, Lemon, to the •et~ngo 

ldRo FRIEIIUJl .1nqu1re4 1t· there. were 8AJ comments or 

coi'rec\iona to be ·.-a.a to 'he 1'1nal JiU.nutea ot the Third 

Meeting ot the ~aoQtlve Committee. 

· · MR. MILLER 11apl1e4 tliat ·then were none trcna t~e 

Br1~1sh t>elegat~oa~ · · .· . · . . . !AR •. FRIEDMAN,- maklag raterenoe to the first paragraph 011 

page two,. stated that the second line should have road in part "AFSA Ottlce ot Re~earoh ·and Development"· to avoid ooa.tusion 

with the· Research. and Development Board of the Departme~t of 

Det"nse e . . . . 

. . 

The .mxacutlve Comeilttee approved the Final ~inutes of the 

Third Meeting as written. 

In coJ111eotion with the min~tes wider consideration, Mr" 

FRIEDMAN referred to the last paragraph on page six0 a~ inquired ot Mro·Mlller whether he had received approval from 

GOHQ, on· the use ot the code word "BRU'l'US" ~- · 

. ·MRo MILLER replied that such approval had been obtained 

· prlor to the Third Meeting of the Executive Committeep and 

explained ·that he had inquired about the use of the codeword 

"AJAX", and had found that it was already in 11se, JJ.owever 11: 

he add•d that he was agreeable to using "AJAX". 1n British_:.,. 

u.s. papers and cQrrespondeaoe as the designation tor tho 

5 ... rotor CCMo 

DRo SINXOV suggested that perhaps the U. s~ c·ould reoon ... . sider the matter 1. and find another a.ame thttt did aot cont.11ct 

with British codeword terminologyo · 

ADMIRAL STONE remarked that since the contlict was on 

the British side, and since Mrv Miller had indicated his 

willingness to go ahead alld use· the ·v1ord1 that he. ~a of the 

opinion that it should then be_usedv · 

MR. Ml°LLER commented that the signal he had reae1ved·from . GCHq was not indicative as to what the word ''AJAX'' had been· 

assigned to. but that he would. like to make a ~ese-rv.ation to 

the ettect that he would be agreeable to ~he. word's use, .pro- vided that it ·had not been assigne.d to some communicationa 

project, in which oase a co.rif llct 0011ld conoeivabJ.r ooouro 

l 

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.Ji= - .. 

. Imo FRlEl>lllN axplalD.ed that. Item 2 on the agenda would be. 

4ate.rre4 until CO!Uia44er ~reo!UD.aa.'a arrlval. Re auggeate4 that 

the Committee o~~de.r Xtea 3,, aa4 requested Dro Sink~v •a· 

OOJllll8.Dts,. · . · 

DRo SDl.OV' nad CJi(Ql OOO&'Hld repoirt ·ot 3U.b=Coalttea "B"o· 

He po1Ate4 out 1ibat -idle 1.1t~st Report; hflcl aot beu complete la 

that ~he appelldloes .ooate!al.ng ~rlet daaorlptiocs of the 1teu 

41aaaaaae4 ha4 not beea aetaohed. Ba ex.Plalaecl that those ap. peacU.oes had AOW been md4aa.. alOGJS wl\h th~ amendments agreed 

to at ·the 'l'h1Jt4 Mee\S.iag.,. · . . · 

After·a·brlet dlac&ASs!on lt was agreed that t!l.e tollold.ng amell4menta wo1tld be macle to tile SeOolld Re.Port or SUboOlimltt4"1 

"B"": 

lo .Ame.nd par.arapb l~. to read as follows: 

"l •. SU~Oo.aalt'tee B ba made u ezobaage ot tech• 

nloal lntol'lllBtloa ooaoeralag ·varloilil or1ptoeyatema falling in the· general ca,egor,. ot •speolal p"'poae teleprinter syste.ms to~ the ex~haage or ooJlliluAioa~ona 

lntelligetloe material .• ' 'l'h.e 9r1ptosystems disauase4 

are divided ·1.nto the toll~Df' groups: · 

NON-SYNCHRONOUS 

RO'l'OR MAzE DY GENERA'l'ORS. 

ASAM 2•1 

U.K. ..,.·..;.. ·.- .. noll1ok 

S!'NCIIRONOOS 

AFSAM-9 0 if provided with 

s1no.hrono11s teat'1re•.~· 

5 u.c.o. 

(Seoratype)" 

2d Amend paragraph )ao to read as follows: . . 

~J. a. We .note that Rockez is presently being used for the exchange ot aomm.unioationa 

tnte111genoe material.," 

.3o Aniend par~~aph 4b~ to reQ4 .as follows: . . 

"4• b. Either ·maolline ls available 1.n autr1·-

clent quaatlt1·to illeet oarreJlt requirements ln the exchange of ooammud.oatior&a intelligence material.;_":1; · · 

2 

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'.~· 

j 

•. ~F _!D:~6_7~_63 

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40 4~ Amem paragraph S to read as tollowa: 

"5 ... IA ~e ooarse ot the ·dlscusalo.ns 01& equipments. 11aiag one-time tapes, a br1et.ctesor1p1;1on was given ot 

Br1tlsh progress in keT-ta99 produotio.n equipment. In 

Tlew ot ~e olcae esuaooRa~loa ot auoh 11qu1p•nt with · one-time apt;ems. ~ 1·t. is reoammeftded that the e11bJeot of 

pro4uot1on eqQipment be added ·to th~ agenda of the next 

Brlt18h-tJ.s .. q~USIC oontereaoen" . 

S&lbJeot to Ula. toi-egoi·ng ·ameadlllenta, the Kzeoat1ve c~ 

mittae approved the seooa4 RepQ.rt Df Sllb-CDm&llittee "B". · 

Co~an4e~ Trecbman·Jo1ne4 the Commltt~e ·at 1445. . . 

•" ,. ,.,.,. ••·•••I • 

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... 

~~ 2o.· OOWSIDJRA'l'IOR O'I 2.p 'l'BIRD. RKP01l'l' ~ SUB·COuta:TTlll· ''A". 

· URa .rRDmwt !'8qu.esla4 Capf;ai.m sSt-to~ t;o rea4 the 'l'h!.i-4 

Report of &Lb.-C.ommlt~~ "An.• · · . . 

. CAP'lAlli SAFJ'OQD NSHil ~lie lM>PC~. a.Rd attaga oocalde~ble 

~iaonssioa9 the Coa!t~@~ ~~ t@ ame.na ~b.e H.POr1; as follon: 

l. Amend paragft)ph ~ to :reacl as foliowa: . . 

~4. ~1th "1e im~~odaotlom ot the new BOii 017pio principle, the foll@~JU!8 operating taoillt1ee will be 

available: . . · 

(a) .Texts comis1·st1ng either ot 26 letters 

plua •P•• but not lmlwl1ng nwnerals. ore 

alter.ciat1vel.r. ot lO·aumerals plus one 

add1t1oaal armbol plaa apace ~ut not 1nol.ud1og letters,.~ b•· enorypte4. ·on· 

.deor1ptlon. "'-" Will prlat as "X" as wit.ta. 

the preaeat COM. 

(b) Rone of the ad~~loaal rac111,1ea, tor 

exf!l.IDple 9. · a mixture of lettel'8 &Ad ·r1r,u:rea, offered by a s'8a4ard Teleprinter will b~· 

available f .,. 

2.. Amead ,paragraph 5 to read as follows: . . 

"Se1 'l'he v.s .. alid the British are ourreatll' balld1.ng 

n,,. ott-line OJ.Pluir •chines capable ot e.mplOJ'ing the 

7•rQtor- BCM pr1li01ple alld otteriag soJll8 or all or the 

tao111t1ea inherent.· 1n standard Telepi-1a.te.ra •. 'l'.b.e teoll-

!U.que by whloh these facl-11 ties will be provided is 

ditterent ln'the UoS, design from. that employe4 la the 

Britlsh·desiga., due to differences in operating requ1~emanta, aa set tortb la garagraphs 7 and 8,, ·belowo" 

3.. .Amend paraBraph ~. in part, as tollowa: 

''60 Both nations are agreed that the following general requirements, it poss1ble 11: be met:" . . 

4o ·Amend paragraph 7 as follows: 

"7p· The British Operational Stott. require that ott• 

line machines wh1oh,are to.provide a11toinatlc".eo.cryptio11· and dacrJption··shall be capable or: · 

.4 

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. -
.; 

"(a) Aooeptiag a tape. pertorated 011 &!IT · 

'l'eleprinter employing the Internatlanal 

Telegraph ~lphabet Moo 2o (Sae page 2651 Telegraph Reg~lat1ons, Cairo Revi~lon ot 1938) · . 

Q(bJ P.resentlag a"tomutioally in page torm 

the decrypted .version identical with 

the original.text.· Thus, tor example, all the Teleprinter tunot~ona required t:~.~: ~·r;ibulatl~n which appeared· 1.n. th& 

or1·g1nal text aust be rep~o~uo .. e.d. ·4ur1ng 4eo'rypt1on a.ad be. capable of·. o,peratlng 

a stands:~ 'l'eleprlnter.r. '' · 

. . 5~ Paragraph 8 ~ .net.ta "ol~arly d~f1.aed" and substi~ tll te "exactly specitl·e·d."·~ · · 

. 6., Amend J)ar~~aj>h Sa. and. Sb. to rea~. a~ ·r~.llows: 

" (a) Use some '.bu.t not .all ot the upper . oaae 

ollaractersD · (Numbers and slultt';;;.m~rk 

are uise!S-l~' 

"(b) In,s.~~- ··1ca:rr1age Return•~. alld. ·!'Line Feed'· 

d~!ng ·decryption only at t4~-· ~nd .. ot 

elioh lino y .·Thus the or1g1na tor.-1$ · tab· · :u;atlo.n oauot be reprodu.oed:." 

1 o · Amend p'aragraph 9 to reed as follows: 

••9. On 20 October a working party .ot Subcommittee 

A Visits~ tb.e Teletype ·Cc;>rporatiOA to· inspect and ·dis-. 

CU.SS the., U oSa '1'014' in ··the hope that some .me·E\DS might 

be devised \vhereby ·the··.,U6S. cipher machine· 'PCM' plu.s the CSP SOOQ "(Automatic Ott~Line Equipment) and the 

British o1p}le,:.- machine·s 'PENDRAGON' or 'SINGLET' could · 1nterwork11 wnt,ie· ·a till being capable of lvorking with · ex1stins cipher machines ot the nation concerned and· . also providi.og the tac ill-ties ~quired by that ilatio~ .• " 

· So Delete paragraph l.O(a). ·and reletter su'bpa~graphs. 10 (·b) · to read 10 (a); 10.( c) t·o read 10 ( b) , 10 ( d ). tQ read 10 ( c·) , lO(e) to read lO(d) 1 and lP(t) to read lO(e)o · · 

9" Paraeraph lO(a) :: .... I~ert "functions, upper ·case . characters.. and other" between "Teleprinter" and ''fac111 ties" o 

lOo Paragraph lO(o) .- De.late -"as a matt.er or 11rsenc7" ~ . 

. . 

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.. -:···.·· .. -~·. 

.... 

... ,·~ 

. ·.·. ~: .. ~7. 

. ~: 
11" Paragra~J& 10(~)- ... Inse3:~ "The.t. 00 batore "einoe" la tl~at. !.ina.,.. , · 

12~. Amend pa~aph.10(e) ~o read.._, follna: 

"(a) 'l'hat 11&tGlRhaaie of vlewa; iJa.part.loular, · Oil racommGdatlons (bJ1 (o),. amd icl) above. 

be coat·10.au~a. n . · . . . . . 

sub~eo~ to the· torsgo1.ag t1111emlmeat•D the .Third Report ot 

SUb-Commlttea "A'' was approved· b1 the· Exeoutive Ccaudttae., 

6. 

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-- --·---
.~ 

RIPOR'l ON PA'§Jm! PROBL!eo 

&., l'RXEDMAH stated that Captra1n Harper Jlad soma 

1nf'ormet1on perta1niag to »ate~t rights to briqg before the 

Committee at this ~ime~ 

OAP'l'AIR HARPER ~m$rk@d ~ll&e.~ ~~a 1ate~t a~~@~m~y haa 

broaght to his attentloc Artiole VI amd AnAex D·of ~he Ml&tGal 

Defense Assist.anoe Agreemei:it. ~tween ibe United Sta\'tif!!!!& ot Amerio~ amt.the Unltea Kingdom ot GNat Britain and Northern 

Ireland·, ·which Ile read as tollow"-: 

AR'l'IC'LE 'WI 

"lo The ·two. oQAt~ot·:lng GoY®i>mn&nts will negotiate ap""' · 

propriate arrangements between them respecting responsibility for cla1ma fer the use or inf'ringsment of inventions covered · 

by patents or patent appl!~at1ocs 1 trad&marka,·or copyrights, 

or other similar claims arising from.the use ot·devicesD·prooesses, or technolosical 1ntormatiom in comaection with ~qu1J;· 

ment, materials, or serwices furnished p11rsuant to this Agree- men~, or tarnished 1~ the l4terests. of produoti~n undertaken 

by agreement between the two oontraatiog GOV(lrM'lB.nts 1n im- plementa~1on ot the pledges ot selt-hslp and DUAtual aid contained in th' North Atlantic Trea\yo 

ANNEX D 

"During the course of the negot1atlons ot the Mutual 08'"' 

tense Ass1stamse Agreement, the represeAtatives of. the two 

oontraotiag Governmonta hav~ reached the understallldl.ng that . the tollowlag points \dll be co.nsldered in the negotiations· provided tor 1n Article VI: 

(a) The 1ccllls1on ot·u 11.cdertakiag whereby each 

contracting Government w~uld assume the reapcnslbility 

tor all the patent or sim!ler olai.ms of its nationals 

raterred to in Article VI of th~ said Agreement and for 

such claims arising in its Jllr1sd1otio~ of .nationals 

ot an,r country not a party to this Agreement~ · · 

(b) The terms on which.iAvantions \TOuld be oo.mmu.nioated to oontractors·with a ~lew to protecti.ae the com-· 

mercial rights ot inv,ntQr~~ · . · 

(c) Rights in improvements ·or other m0d1tications · 

of patented inventloos .. 

1 

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. "(d)"·Arrangement11 for the proteotion or secret· gro·-

oesees and secret technologloal iotormatloa, as di~tlnot 

from patente4 and. patentable 1nveat1onso. · 

. (e) 'lbe s1atem tor di•oloalng the users and the extent .of the ~se cf the· paMna9 trade secrets and eopy- rlghta referred to !~·Article VI." 

. CAft.AIH BABPER· a44etl ihat he .bad diacaasaecl.the matter tur- . ther with t.he J\J'JIT's J'.adge Adwooate General·•a D•par.tment, and 

that the1 were of the oplnloa tha' c11a~loeuz-es ot. -p~tenta, .or 

1nvent1ou oovered bf patent appl1oatS.o~a" would be.:to ~he 

·~enefit ot the United States Government, and consistent with . the. rights· which ·thEfUn1te4 ·states Oovermaant WDllld normallJ h~ld\' 

Mao · PRIEmwf remarlmtl that he ·had a memoran~u frDm Cap- . t.a1A Barper•a.· patent attoroe.v whioh .was oonsiste~~- with the .~4format1on that Captain JI~per !Uld Just preaut19d·;. He read · the memoraaclwa to th~ Exeout1ve CoiDmlttee as follows: . 

. "lo The latest· ·tc>rmal" asret1ment apeoitlcelJ,.y del148Kt1ng the rights aad duties ot the United Statea 

and British Gover.nments relative to patents and lnve~­

tiollS was the·so-oalle4 .Pate~t Interohenge Agreeaient,. 

uw expired.;· 

. 2o The Mutual n,tease. Aile1staiice Treaty ot 1950 . ·(Atl~tlo Pact} ooQtalns a olaU.se obligating· the United 

States and the Ullited Xiagdom. to negotiate a new.agree• 

ment on suoh·matters ·- aad there is a ballet 011rr8llt 1D 

the Pentagon that any new undertakl.ag will be very a1m1· 

lar to the 'Patent Interchange AgNement,, bat no new arran3ement has as yet been. exec1.1ted.o· 

3\' In the· absence of a speoltlc understanding, .1 t is ~he view of the Arl03 JAG and the Legal Di vision 

ot the Signal Corps that th~ conventlon~l 11oense obtained by the aovernment from its own employees. aa well 

as from contraotors 9 -wh1oh.l1oense permits m,nufaotura 

and 11ee tor ·sovernmental RUrposea,. jQstitles the con•. 

ve7ance of technical lnloma·tlon as well as equipments involving inventions covered by ~nited States patents 

or patent applications~ The view-of the groups mentioned la, in other words, that govermnental use ls 

virtually synoJ11'1UOUS with sovernmentai advantiii·~ 

8 

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SECRET 

"4(1.· As far as· is kAOl!ll'lll in tha Off.ice ot the .TAG, 

notw1 thstandins large and varied shipments of equip.... · ment to foreign ·countl'.'ies dur!Ag and following i'lorld. ~·1ar II 0· AO· cassa have arisen 1n the ooarts which could 

result in a J~dicial determination of the indicated 

interpretation of ·the exprassion govermnental J!!!o" 

CAPTAIN ·SAFFORD remarked that he woulci" lib· to"-. bring up 

a aew subJect before go~ng· _.i>im to the .Gsxt 1 tam on the agenda,,_. He made. refeNnce to paragraph_?d of the First Report ct.Sub"."' 

Comnittee "A" date~ ~·o · ·september · 1950 which reaci as tollo~: 

"do ;Rotor•·· OD both U oSo ai;id British VO~a·~.ODS 

of ,the 7-rotor· OOM to ·b®· ph,ys!e-.1.l.Y .. :::a.~ 

or.rptographloally interchangeable~; ·. This 

means that manutacturlna 1 and w1~1.ng de• 

tails to.· be ··f'urnished to the British for 

this .pll!"pose o ... 

OAPTAD SAFll'ORP oont1.ou.ed by eX.Plai.mlog that at. the ti.me 

the report was writ.ten, it was proposed that the- British 

wo.11ld 11se the ftPEX adapter developed by Comma.oder .Se1ler 11 bot 

-that since the visit to the. Teletype Corporatlc.11 11 :Mr .. Miller 

and -the other engineer& Jiad decided to·use th~ ready-~de unit 

rather than the one developed by Commander Seiler.,. and that in 

view or the toregoiag, it would be· preferable to. ·:u.se 21" rotors 

amt make them standard thro~ghout the Britis~ Sel"Y1C_e., 

MRo·MILLEn remarked that on the draft report to the UoS~ 

and British Chiefs ot Staff~ about to· come before.·. the Committee 

for oonsideratio~s. he was in complete agreement with Captain 

Saff'ordo He ootlt"inued by emp.has1z1.ng that he· did· not desire., to 

Cb!Dl\lit the Brit~sh at this time, but would.like tp·reoonsider tt;le matter as a wholao He added that he would be· .happy to 

·standardize on r;>ne or the other, ieeo ,,. either the CSP 1700 

or the .. PCM. · · 

MR. FRIEDMAN inquired or Mr.; Mills!' it he would SUf':B&St 

some specific changes in wording ot t~e draft report~ 

MRo MILLER replied that this item should override the 

agreeinent in the earlier one 0 and that such should be re~ .. tlected in the minutesc· · 

Betore proc.eeding to the next item on the agen~n,, Mao 

FRIEDMAN inquired it th~re w~re any comments on the completed First Report ot Sub-Col'JDlittee. "B". 

9 

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r 

... 
· · REF Tn · n,:;;.:μ63 -i4tJ p - ..... ~"~. ~tt;li<C ll 

. DRo SINltOV pointed out that 14 Appen41x "A'°, AFSA!l 7, 

under the ~eading "Cryptographic Featu.resn the let line 

should read "Eight 36 point ~otora"• 

MR. FRIED~ iaqu1~d abo'1t the word "permitting". 

D~. SINKOV repliecl that the wording .. Jlad been suggested b7 Colonel Henn-Collins,, .. sad -that the U .• s. wording would be 

"literal cipher maohiasw~ 

· · ADMIRAL STONE :i~qu1re61 if then nre oe~aln terms in 

the paper wh1oh .might make it advisable tQ prepare ··a glossary., 

DR. SimtOV ~eplie~ that most ot the words could be found 

1n the ourrent o~nfldeQ..tia·l list ot ·agreed .terms,· and there- to~e •. he saw ~o need for a glosaarya · 

MR •. FRIEDMAN pointed out that some of 'the Appendices had heaclli~es·ana: that some of them did not. 

.... MR. MILLER explained that they had been compiled in 

great be.ate~ ·and.thet it had been agreed that 1n oraer to 

publish them as~ aoon as poss1)>le, )lta.ndardlzat1o.i1 would ~t 

~~d~. . . 

J.1R o J'RIEDllAN saggested . tba t the paper· be turned over to 

.members of Sub-Committee -."B" tor the purpose of res_olv1ilg the d~screpanoes by.the time or the f'i.aal .meat!ngq 

· rmo MILLER observed that he was the oa.17 remailii.ag British member of the Committeeo · · · · 

DR. SINKOV suggested that perhaps llr~ Douglas could 

represent the u •. ~o members of the Committee ~or this purposeo· 

10 

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' 

CONSIDERATION OF THE PROPOSED REPOi'f TO THE UoSo 

AND U o Ko JOIN11' CHIEFS or STAFF BYE BRUSA COMMONI0ATIONS SECURITY c6't11EREN'OEo 

. . MRo FRIEDMAN thanked Mro. Miller for his assistance in . · · pi:9ep_-aring the two draft:·. ~-p~rts to the British. il".nd U. so Chiefs . · ;"·:: '·ot·' Staff P and· suggested· ·'tffa·t.' the report on the replacement of .· ·. ;the COM be considered at -tlffs timeo .. 

. ':f,'he Executive ·'Ci~- ttee -agreed that the_ to-!.Lowing amend= .rn€t~t;s w~uld be ma.de- ·t.IJ the report: 

. 

·. 2o . Amend parEl$~&ph lo-· to read as follows': 

"l. As ,,figre.ed by the British and US Chief's of stat't* 

a British/uS:· Co.o.f~renc.~· to con.sider the replacement of :·.·· 

the existing. Combined Cypher Machine opened :1n' ~7ashi.agton 

on 21 Septembe·r .19-50 9 as a result ·of which tJ).e senior Bri.... . ..... tish RepresentativfJ recommends that the Bri'ti·sh Chief's of 

Staff accept the otter by the UoS .. Ohiets· ot··statf' of the 

7-rotor BCM pri.ocipl,e as the long-term solution ot the 

replacement for the present combined cipher machine (cc:r.O o t0 

3~ Amend paragraph 2o to read as foliow~: 

"2., Jviany related cryptographic. devices and f'eatllres 

were demonstrated and discussed-o Summaries of the pro- ceedings at these meetil'J.8.s· have. been prepared and these . are . held both by the Director 11 Al9Med Forces Security Agency 9 Washington! and the Seoretary9 Cypliar Policy Board 9 Londono 

In our est mation this Conference has- been or unquestioned value in the field of Combined Communic.ations Security,," 

4~ Amend paragraph )p·in part, as follows: 

'')o It is recomm~nded: 

··(a) That immediately and on .. a continuing basis 

there be complete interchange of' technical 

details or ''the devices discussed in this Contere~a·~ This should include tech~ical · visits ... " 

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.. - , .. ,. REF ID_:~67!.63 

SP SECRE I · 

S.·a· ."11end paragraph 4 as follows: 

"4o The geDeral recommendations in paragraph 3 above 

together wit.h the d.et~~led technical reoom.mendations of 

the conference w~ich e;i'.e attached as Appendix A to this 

report are· sm~t·ted for approval by the 1'r1tiah and U·os .• 

Chi ets of Staf~··o?·" 

60 Appewlix··A, amend title to read 11SnNICAt. 

RECO!DSNDATIONS11 ,;·· 

7 o· . Appe.n~ix A9 delete "7•.rot,or. BCM" whereioever appear- 1.ng 14 the AppeJ'idlx• and s~bstitute msRU'lOSw. . -

a·.. Appendix A9 Replacemen1P ot the . kiati·ng CCU. 

a o Ame11.d paragraph (a) ·to read as tollows: 

" ( 8.'") That the or,rptographic principles ot the 

7-rotor BCH (or.rptosystem BRU'l'US) be . . adopted as a replacement tor the CCM 1n. 

COmbi.lled 00mD1UOiCat10l18o II . . 

b·o Amend parag~ph (d) t:> read as ·f~llows: 

ti•(d). That insofar as practicable rotors of u.s. 

and British ve.rsiona of the ~RU'l'US cryptosys:tem. be physicall.7 and oryptographloall7 

· i"nterohenseable Bild that to this end the 

Br1.t1sh should adopt one or .more ot the 

sizes ·to be used by the UoS~· F~rther 9 · that .all data, manu.taot11riag8_ and wiring details be ttirniahed to the British tor 

tbi_s purpose o " 

9o - Ap~.s:idix A~. Tem2orar1 Isprovem~nt to tho Existing CC!lo 

aa Paragraph (a).·. delete "henceforth" and a·u.bstitute 

"as soon as praoticable"o Second line, insert 

"existi-ng"' between "each" and "0014" o . Delete 

second sentenoe·o Delete last sentence in paren- tbesls.o · 

b.; Paragraph (b)_, ·delete "after su1tabl.e rot~re become ava1lable":o 

12. 

TOP SEC.RET 
• •· ,,. .REF ID:A67163 

SECRET • · .The. Executive Comμ.iitt~e. then agreed that the following ·amendments would be .made to the Re~ort to the J;!;rit.~~h and 

u.·s Chiefs ot Staff' by the British/US Communication. Security Exploratory Conferenc··a: 

·· lo Amend the·· t'i.tle to read as follows:. 

-.;;;.-.-,;;;;;;;;.;;;;.;.;.;-.....~-------=:;;--...-wr.-.~ " __ 2o Delete "E~ploratory Conference for,. ·~h·e'- ·· "i'=rom the 

·heading 1mmed1ate~y below the ti tleo Subparagraph "(e) 11 insert "Communication" between "of" and "Intellige~ce"o 

3~ Amend p·aragraph 2 to read as follo'AS: 

"2o swnma:r.~es of the proceedings at the meetings· which followed have been prepared and these. are held 

both by the Direc·tor.; Armed ]'otoees Sec_urity · Agena y 11 

. Washington., and the Secretary 9 Cypher Policy Board, London~ In our estimatlon this conference has been 

or u.nquestionec;l value not _only .1.n the field. of Com= 

bined Commu.nicatlons Security but also· in t·he f'ield 

ot US and .Brit·~~sh Intra=Oommunications Securitfo" 

4o · Amend paragraph 3 to read as follows: 

")., It is recommended: 

(a) That immediately and on a continuing 

basis 9 there be complete interchange 

ot the technical details· or the systems discussed in this c·onf'erence.., 

This should include technical visitso 

(b) That discussion and interchange or 

·technical information on certain 

other 1 tems of combined interest.I> suc·h 

as the security aspects ot IFF0 authentication systems 9 be au.thorizedo 

(c) That security evaluations be made and 

exchanged on all items discussedo 

(d) That the UoSo~UoKQ JCEO consider and 

resolve as a matter of' urgency the 

operational requirements in all fields 

of C.ombined Cryp.tographic Commuilicatio.nso 

l) 

TOP SE-CRET 
' ... ,. 

'' (e) That there be annu.al conf'eren.ces ·on . these subjects tor the next four years, 

to be held alternately in London ana 

in :fashington, the first of these to 

take place in tondon in approximately nine months time.q_ re 

So Amend paragraph 4 to reed as follows: 

· "4Q The general -recommendations in paragraph ) 

above togsthel" with the. detailed conclusi·ons of the 

Conference \vhicb. are .attached as Appendljt' A- ·;to this 

report are subnd-ttea. .. tor the approval of the British 

and u. So Chiefs O.f st•affo 0

' 

. · 6~ Appeadix Au p·aragraph Ao (2) .r Insert "bf ·the fore-

:$ri.1.4.g19 between "a.ny''" ·ana: "purpose", changl.ag ".P,urp.o·sen to 

·.read: vtpurposes•v o Be.to·re the word "possible'9 insert "so.mo" o 

7 o Appendix Ao ... pal'.ag~_aph A~ (3) 9 amend ·2nd sentence to 

read, in part: "Some p·ossible devices are:·" 

So lppandix A9 paragraph B9 amend to re·ad 9 i:n part 9 

as t'ollows: . . 

"Bo Merchant Ship Telegraphic Systems. . 

A machine sy~tem of'· at least equivalent security but faster than CU.rsex.9 which is under,.considel"at1on9 should replace it, whe·n avr:lilable 9 and that such a 

system should be selected within the next 12 monthso 

Some possible devices are:". · 

9o Appendix Ao paragraph 0(2) 9 insert "some" bei'o~e 

"possibla''c . . 

lO_o Appendix A, paragraph. C()) 9 insert "some" before 

"possible" o · 

llo Appendix As paragra'ph C (3 )(b) 9 delete '°BCfl .. 7~' and 

substitute n7-rotor BCM"o 

120 Appe.cdix A9 paragraph D(J) 9 insert "Some'0 before 

"possible"·o 

14 

TOP SECRET 

~,... .. 
·13 .. Appendix,A, add new paragraph Z as follows: 

"lo Telef1•ia.ter Sire.ms f·or the· Exchange of .OoJ:U!lUnication 

lnte 11genoe teriai I 

(1) It there 1s to be &A immediate substitution for 

ROOKBI a. selection oan be mad® from the following machines: 

ASAM 2 ... 1 

(2) Either machiae ls awailable in satt1o1ant qaaa- tity to meet current requirements in the ·exchange of 1ntellige.noe materialoft 

'!'he meeting adjoornsd at 17170 

TOP SECRET 
~- • REF ID:A67163 ~ 

SECRET 

bllcat;lft Comml.ttea 

AOBRDA 

r. ~ to be W.4 a uoo, 25 ~ 1950 

S• Cma:Lderation of tbe proposed Report. to tba u.s. and Uda Job.t 

SECRET 
• 

REF ID:A67163·· ~z_:.ae/,.,. ... -.~_. 

SECRET AFSA- oor 

JS oatobelt. 1950 

DIORARDUJI r.oR .,.JB or m EIECU!DB COBlft1B 

SUBJEO'ls Sellednled l!Ntd.ngs of '118 llasliJ.U.'1'9 Camml.ttee. BRmA 

Cm1muadodlon Semlttr ~ 

lo !he foUmng lle81dDp ot ilae 111-14• ~. BmBA 

CG!aiHMdcetiaa Secmd.'V Ccmtennoe boe 'blm ee'wdnJe41 

1400 as Octaobar 19500 Jlfee1d.ng ot OcaMm4 lzaatttw CmmL'fAMae 

1400 'II ~ 1950. ft.nal 1fasU!1I Gt Oeb!·nd Bmamtl.w 

Caml\tae 

2e ~ .'1411 be ba14 in .lkal.1Zl2e '.IA1SICS!Aa 

Jo hr 10UI' iatomatlma tbe .f1De1 ~ seaslcm has bGllD 

Nh8"1led .r. 1500,, Mdq• :1:1 anew 1950. 1D BDB 12J2,, lfAVSBm'lAo 

Ck>~a.... WILLLVI Po Pm::. . .~' Clltdlrlm. Bllloutift :'*8 

SECRET 
·~~· ~- -

- .-

BRITISH · .... UNITED STATES CO.DUJNICATIONS SECURITY CONFERENCE -

MIIUTES OF 1 

THE Tm.RD M§ETING OF TH! EXECUTIVE COMMITTEJC I 

The Third M®etiq of tbe Executive Committee or ·tb.e Br1"" 

tish - United States Cllmmunlc·otioas Securltf Conterenoe was 

held at .1400.·on 11 October 19SO in Room 1212 11 U~ So Navy . Secu.ri ty StatioA, WasbJ.ngtoa .. , Do Co 

Repres~ntatlvea·Present 

United States· 

• 

Mr?. t~/(O Fo Fr1edman9 Chairman 

Rear Adiniral .·Earl Eo Stone 11 USN 

Captain L~ Fa Saftord. 11 USN 

Captain Jo So Harper, ·uSN 

Lt.:i Cola·G~ Vo Johnsoi111 USA ~to Cola Ro Ho Horton, USA 

Major·Go Eo Parr 11 USAF 

Dr., A a Sinkov 

United Kingdom. 

~.b:'o To Ra Vlo Burton Miller 

Captain, the &arl Cairns, R .. N~· 

Brigadier John _Ho_ Tiltm~· 

. Secretariat 

Lieutenant Jo ~~ Pearson, USN Mis~ Catherine Mo Johnso.a. 

TOP -SECRET 
JTEM ls APPROVAL 01'" MINUTES OF FIRST AND SECOND MI~ETINGS: 

.MR~ FRIED.MAN in.quired. t°f there were aay comments or 

corI"ections:to bra -made to tlll.e Mirmtes ot the.First and Seco~d MeetiQgSc 

There ·were nt>.m&o. 

. . 

The·c~ttee approwed the mill&!tes ot the First and 

Second Meeti41s.o · 

A~o FRI.EDMAN made ra~a,~~oe to~ part of-~he minutes of 

the First Exsc"tive Meeting which reed ·as follows:· . .. ·- . 

~00000 making rsterence to the ~ackg~ound statements 

that he had read at the First Noetirns of the Plenary Commit~eep Mr·o Friedm.an ·inquired ·it 'the British Delega~ion had any objections. or.comments to make 9 

particularly .with regard to the article.a quoted from 

the agreements. it · 

"Mr. ».~iller replied that his Delegation had no com ... men ts on the art·ic les quoted. from the agreements 11 but that they wo~ld like to.ma~e certain thut they unde·rstood then., 10 · 

He inquired. of Mro Miller .as to whether he had had an 

opportunity to stu.dy the articles in questiono .. 

l•.Ro MILLRR ·replied in the affirmative., and stated that he 

woμ.!d lik:e to make certain that his interpretation of tho nrti= 

cles was the same as the U oS·o interpretation... He continued by 

explaining that it was his understanding, that if British. Au ... thorities desired. to cop.r something trom· a U oS·o· plan or d.evice" 

they could do so without waiting tor detailed negotiations be-. 

tween the two Governments, provided.that .arrangements were Jxiade 

with regard to patent rightso 

.lVll~. FRIEDMAN stated ·that he thought Mro Miller was oo.rrect 9 but added ~hat he would like to review Article VI as follows:. . 

"lo The two contracting Governments will negotiate appropriate ·arrangements between. them respecting respon ... sibility for claims tor t~e use or infringement ot inventions covered by patents or pateDt applications 9 · 

trademarks 9 or copyr1ghts 9 ·or other similar claims 

·l 

TOP. SECRET 
"arising from.the use of dev1ces 8 processes,. or 

technological im'ormation in connection with equipme.nt·, mat~rials or services furnished pursuant to · ·this ··Agraemnt • or fUra1$_hed. !Ell the 1ntere~t;s of. pro~ 

duot1on undertaken by agreement· between the two 004-

tracti'ng ·Govts·r.runents oim inplementatioa ot the pledges 

ot selt-he.lp·allld mutual aid contained in the North 

Atlantic· Trsatf a" . . 

He contin~ed by sa1i.ag .that he· had requested t~e patent section ot the~Otf!ce .or Research and Dev~lopmeDt to make a 

study whic·h would help to clarity aKJW questions v1hich might 

a.riseo He s·~~tedl. that he had not yet rec-eived the report• but wotild have it ready for presentation at the next 

meeting of the Exec;u1tive C·ommi ttee. . . 

CAPTAIN ~PER r.~markod that· he thqught tt.at it was 

generally cons1dere·d that experimentation was the same as 

research 9 and as such did not come within the scope of pat~nt rights~ He ·added that. patent rights· per·tained to 

·ccnstruotion:.or use. tor commercial!. purposeso 

·MRo ·MILLER a.Breed, bu.t stated that he wa.s. of the opini'on 

that th~ matter went. :fiJ.rth.er .than that; he explQined that he 

thought thnt one- Goverament might copy the .patents .of the ct.bar. 

as l.ong as the patent :copied v1ere used for purely governmental ·. se·rvice., He continued 'b.r ~aying that. patent-· rishts were i.avolved when a· Government sells the pKtent to a commercial fir.mo:· 

or when they try .to. pror1t trom 1tq · 

MRo FRil!:DMAN commented that the understanding that UoSc> 

Authorities had with respect to the· protection of information 

was that it would not be published in a Journal~. He stated 

that he thotight the arrangeme.nt was ot a reciprocH.'l naturefl. 

that is, if the British Government desired to incorporate· certain things f'or purely British Governmental use from ideas 

covered by UoSo pate.11ts 11 then the U.S,, Gover.ameat w~ull.d be 

t'ree to make similar use ot ideas covered by Briti~h .patents,; 

CAPTAIN HARPER stated that he was.a. 9t sure· 1.f i.~ro Friedman •s 

remarks were ent1reiy correoto He pointed out that some patents 

were taken out in- an 1.adiv1dual'S na.ID49 8 and the Government wa~ 

given full and tree u.se of them9 but that this d.idn't mean that 

the opposite government would have tree usage ot tl~e.m.~ He added 

that probably the same thins· was true trom a British stundpo.1nto· 

CAPTAIN SAFFORD remarked that the Goverrun.e.nt he.d the 

riBht to transfer the use ot a patent to another Government 

on !ts own term.so 

.2 

TOP SECRET 
~-

MH o FRIEDMAN stated· t~at there was a paragraph 1.n the Lend= 

Leas.e Law to the effect that the UoSo Gover.mu.eat wo11ld Ulldertake 

to protect tbe rights ot 1n~ento~s under ths Le~d-Lease arrang~­

ments c. lie added that he tho~ht it 0. question for the legal . p·eople to aaswero . 

. CAPTAIN HARPh!R stated11· tor the &Rice ot .tho racord 11 that 

he was of the op1nio4 that· the usage ot·u.oy idea for research 

purposes is Wlrest~ic~ed excspt as to p~bl1cation for the sake 

ot secur!tyc 

MRo FRIB1114AN stated ~hai ine thought 'that, in o..m,r event 11 

many _precedents could be found f'rcm ~"lcrll.d ',"Tar Ilo He reiterated· 

that he would have the report from the legal s~otion·which he 

would pres~at to the Commi~~ee at the ne~t.Meet1ngo 

·) 

TOP SECRET 
ITEM 2., CONSIOERATIOI OP' THE SECOND Rl!."'PORT OF SUBCOWUT'l'EE ''A" o 

KRo FRIEDMAN requested Captain sartord to present the 

second report of Sub-Committee "A'i o 

CAPTAIN·SAFFORD recalled that the first report ot Sub"'! 

Codllllittee ."A" had oq'lered the encryption of l.ltarai textso He 

remarked that· the .a.ext .item that the Committee had co.o.sidEired . was the questio.c iif the ·enceyption of nwnerals plus "XVP or· 

''Slash" i"or purposes of weather, and pointed out that. the Committee had ·agreed that the -~ecessary fa~i!ity should be pro- :srided as soon as 1 t is ."ava!la~le, .where required o . •. 

~1th respect to Eiloryptlcn of Letters, Plus Numerals, Plus 

certain Other Teleprinter Characters, Captain $AJi'FO"RD stated th~t the Committee ·had not been able. to oo~e to ·complete agreement due to the fuct that differ~nt operotio11al requirements 

were invol~edr. He continued by saying th~t a possible compromise. 

between these contliotintz; developments hed recently be.en .p11t forward from the uo· S~ sidep and a working party oonsisti11;~ or himself, Commander Seiler, Commander Linn, Lt., Col, .. Irenn-Colli-.-is; 

and Mr., Jolley had been appointed to 1n~est1gnto the proposal~ 

He added that oil :Friday, 20 October 19.508 he planned ~o·esoort 

. the British members of ·the VIOrking party on a visit to the Tele-. 

type Corporation where the PCM (CSP ~700) and -the new Off-Line 

Automatic Equipment (CSP SOOO) ·\Vere 11nder develop!lient, and . that 

the working party would resume its discussions on 1.:0.0.d~ 11 2) · October 1950 11 Qlld would report in d~e course to Sub-Co~ittee 

"A''o He pointed out thut this was the only point to be cleared 

up 8 and that it y~uld necessitate the reconvening ot Sub~Com­

.mittee "A" for the purpose of rendering a tinal report and recommendations o.-i this point alon_e; he remarked that .if no fi_rm 

understanding could be reached. 8 then Sub-Committee "A" woilld 

have to subl:lit some kind or a recommendation to defer decision 

tor approximately a yearo 

In the W8.J' ·of explanation, ~.mo MILLER pointed out tho.t British· operational people had asked for encipherinent or the whol.e .. teletypewriter series~ but that the Uo So ·requiroment dns .~asically for the enciphorment of letters and·nwnerals onlyo . . 

. ?.'IRo FRIEl.~l\N inquired ot Captain Safford· ·1r this would · apply to the BCMo . 

· CAPTAIN SAFFORD replied that it would have application to 

the new BCMo He explained that agreement had been reached on 

the BC?! principle» and that it.had been accepted ns far as the 

CSP 4800 was concerned.. He pointed out ··that. the BCM had been 

acoepted.8 and that it would be sent to London with no strings attached" .but that this other matter we.s in addition to that in . 

4 

TOP SECRET - - - - - - ------------------ -· - -- - -
· REF .]Q:AffJ~ 

e ro.P ~tcKr: 1 • 

that it was being recommended that th~y e~ one step further, 

and make provisions for the enoipherme.mt of' numerals, '''X" or 

"Slash no 

CAPTAIN SAFFORD commented that· the next repo~t of Subcommittee "A" would deal with the matter in greater dotallo 

He· pointed out that the Army and Navy desired a smaller and light~r machine, and tha~. particularly rrom a Nawy standpoint, it would be adve.ntageou.s to use the same mu.chine tor 

low as well as h16h echelon npplicat1onso . . . ADl!lRAL STONE r~.marked, that since. this matte.r remain.ad 

to be cleared l!.lPs. he sav1 no reason for havln8, the. Executive 

and Plemarr ~eatings scheduled tor Friday~ 

. ·CAPTAIN SAP'FORO comme.oted .that ·while ·the .rermai.riin8 pol.mt 

was· a small one 1.m. 1 tsellf ,· · 1 t ·was -a very importflll t one with · respect· to the conmtructiolll ot t~e maoh!11:eo 

DH~ SlNKOV stated that since the working g~oup· would deal 

altogether with the e~he..age .. ot int'orma.tio~ on ~e·co.MINT side, 

it might be well to close the worf( of sub-Commi,.ttee ''B" by 

transt~rring the teleprinter problem to the next Conferenceo · 

. Mit, FRIEDMAN· replied that he die! not believe su.ch action 

would be valid 8 since the CORISEC Conterence Juid been authorized 

by the Joint Chief a or Staff only for the exchange of crypto- graphic principles., .. and for action in regard to a replacement f'or the CCrJo This view was shared by other members ot 

the ~xecutive Committeeo 

MRo 'FRilIDMAN then stated that it it were agreeable to the 

Committee the Executive and Plenary Committee r,feetings 

scheduled for 13 October·l950 would be cancelled .. · 

The Committee agreed~ 

MRo MILIER stated that it was bis understanding that after 

Sub-Committee "A" had· Stlbmitted its 3rd report 9 and af'tor Subcommittee "B" .had submitted its 2nd report, then there would be 

a final meetina of the Executive and Plenary Committeeso 

MRo FRIEDMAN.agreed, a~d inquired if the Committee ap- proved the Second Report of Sub-Committee •vA" .. 

TOP SECREf 
CAPTAIN HARPER suggested that the use of PCM in the re- . port JI1ight be confusing to both British and Uo So representat1ves.. He pointed· 011t ·that PCM me.amt "pulse co(\e moau.lation'' a 

which was us~d in a considerable number of machines, 

MR .... MILLER remarked that if' quotatioza marks were placed around PCM it would be acceptable to himo 

MRo FRIEDMAN su.ggested that tJlle. a'bb.rewiat~.CRR MBCM be 

used in place ot PCM; hei req.u.eistecll Captain Saf'tord .to oommellLto . . 

CAPTAIN SAFFORD explai~ed that the machine had bsen called 

a .miniature cipher ·machine, and that thra word. "portable" had · been used to ·describe· the mao~i~e d~s to the lack of n better . worda He.mdded that they had .met been co.moerned with the "pulse code modulation"a · · 

DR,, SimCC>V Sll.\gg8Bted that the. parsns be removed :from 

around "CSP 1+700",_aa.d that PCM be. deleted altogethero . . . . . 

ADMIRAL STONE remarked.that he had-seen the title BCM • 7 . used in one of the pap~rs 11 and suggested that possibly BCM-7S 

would be u appropriate d~signaticn.11 . · · 

CAPTAIN ·HARPER observed that SBCrK ini.17,ht be a better 

designat104o · .· · 

CAPTAIN SAFFORD stated that the designation ~sed in coa~· 

trttcts with tho Telety_pe Corporation w~s PC:Mo 

DRo SINKOV pointed out that PCt4 was used in the report· of 

Sub-Committee '

9

B" as well as in the report under oons.ideration, 

and that he thought it might be well to be c~nsistent throughoUto 

?illR"o. FRIEDr.fAN in.quired if the Committee were agr.iaeable to a.dopti~g ·Mrc.- Miller's suggestion,· viz 0 that quotation marks. 

be placed around th~ designation PCPK throughout both reports°'. 

The Committee agreedo 

MRo FRIEDl4AN then asked it the Committee were agreeable 

to accepting the Seoond·Report ot Sub-Committee 10A" 1 . as amendedo. 

The Committee agreed to accept the report as ~ended~ . 

MRo MILLER recalle~ that a suggestion had been made that 

a common title· for the 7-rotor BCM crypto ... technique be .adoptedi;· 

and that the codeword "BRUTUS" had been propcs~d.o He explained that he had siBQalled GOHQ ia the prepd.ses., aLld had received a 

favorable reply.a ;He added that he felt that this matter came · under the cognizance of Sllb=Conmittee "A" bu.t stated that it migh~.be well for the Executive Committee to know that the 

word was acceptable to the Britisho 

·6 

TC)P SECRET 

.~ _. ~ -
1 

? 

CAPT,'\lN SAFFORD stated that hs could 4oi state defiaitelf 9 

bu.t that it was his 11.mderstanding th.at ''BRUTOSr? was bs!ng ussd. elaewb.8~e in the Uo So Armed Forces, hO\vever, he added that it 

was not llstad or.rpto0 wiseo 

Ami!RAL STONE' suggested that the Uo So delegation accspt thli word "BRUTOs111 · su.bJeot to determining w.hsth~ll? it ia alnady 

bei 1.ag used.. · 

. CAPTAIN SAFFORD recommeJmc!ed that th® word '

9

AlAX!9 ba adopted 

as the dsslsnation fo~ the present COM ~n &1l\J of !ts formso He 1aqoi~ed whether Mr~. M!ll~r oo~ld request clearance c~ "AJAX" 

as well" 

MRf. Mit:LER replied in the a:f'f'irmutive,, stating t!lnt b.e 

would do so by signal~ · 

~mo FRIEDMAN inquired if the Committee ·were agreeable to 

proceecling on the basis that tvBRUTUS" would be adopted as the 

designation for the 7-rotor BCM orypto-techn.ique 8 subject to 

the determi~ation that no con~lict exists in U~ So terminology; 

and that 90A1AX" would be adopted as the des13nation for thfii 

press.mt COM in an,j ot its forms 9 subject to the deteminatio.n 

that no conflict exists in British terminologyQ 

The Committee so agreed~ 

OAPTAIN9 TH~ EARL CAIRNS inqQired if the aforementioned desi~na.tions would be stamped on the machines ... 

O~PTAIN SAFFORD replied th~t they would be used in an 

unrestricted status in correspondence, on key lists~ instruc= 

tions, .and name plateso 

r.mo l.VJILLER inquired if the word "AJAX!' would signify the 

5--rotor CCM crypto-technique employing staniard rotors with 

noB-rotati.mg.cam-contourso 

. DRa SINKOV replied i.n the negative, explaiJllin.g that 10AJAX'' 

denoted the basic c.rypto system regardless of the rotors involved~ · 

. rllRo FRIEDMAN remarked. that certain ·'1\.JAX"cr,rpto techniques might be interchangeable with another '~JAX'' using the same cam. 

conto11a.rsci He pointed out that it one didn"t u.se them and the 

other d1d 8 ·1t might result in contusion.,. 

rAR~ MILLER commented that it had boen ·agreed that rotors 

should be standard·ized insof'ar as the BCfl was c o.nc erned., He 

explained that the Pera: machine inclt,1ded the BCM technique but 

that the British would no~ want the responsibility tor produol.11g 

rotors ot the size presentl~ employed in the PCMo 

'7 

TOP SECRE.T 
DR~ SINKOV stated that he thought that Mrn Miller was 

speaking ot two wholly difterent conoepta of' the word "BRUTUS" 

as applied to a crypto syste,m whioh uses a diff'ariant :neahanism.,.. He added that it might call tor different size rotorsn 

r.'!Ro MILLER replied that ''BRUTUS'' was employed 1n. both the 

PCTA and BCM9 and··lnqulred if it w&re agreed thH.t· only BOU ro-. 

tors would be 1n.terohaageable be~ween the British and Uo So 

. :.!Ro FRIED!MN inquired of' ~o· Miller 1.f he desired a note 

in the record to the eftect that he (Mro ·Miller) was not pre- pared to commit himself regarding the interchangeability o~ 

BCM and PCM rotorso · 

HRo MILLER replied 1.n the af'tirmativeo 

CAP'l':\IN 3.'\FFORD remarked that as far as the PO!K was cooceroed, there was no reason for believins that the rotors would 

be any dif'terent froa anythinrt elaep 

c 

8 

TOP SECRET ----------~---- -
IT.EM 3(' · CONSIDERATION Olt"' THE.FIRST Rl!."'PORT OF SUBCOMMITTEE "B''• 

f!Ro FRIEDMAN requested Dr. S1nkov to present the first 

report of ·sub-Committee "B".o 

DRo SINKOV stated that he rcgre~ted that th~ report had 

not been available at an earlier date, but explained that· the 

·J!.ast maeti.11g or the suip...Comm.1~tee had beem held.the previo&as d8J"? He pointed out that the report was nQt yet complete iA 

that brief. descriptions ot the equlpaents mentioned were being prepared, and would be attached to·th~ report as appendiceso Re then read th~ report to .the Comm!~toe. · · . . 

. ?;:uking refer6ll«:'a to paragraph 2 ot the ~port, Captain SAFFORD inquired if there wer.e any reas~n for OIQ.itt1ng the 

Stromberg-Carlson TSS Ciphon.r Syst9Jll f!'om··thtit list. He poi~ted out that there was no technical description of the 

equipment ava~lable at· th.ls timeo · ·. 

MRo ?4ILLER inquired if there would be an opportunit7· to 

discuss this equipment or to demonstrate it. 

CA~AIN SAFFORD r~plied that it· would be very \VOrtb:\vhile 

to have 'Ltc- Coln Hen.ra. ... _Collins examine the equ.ipmcnt.o 

DRo SINKOV pointed out that a nwnber ot equipments had 

l;>een discussed without having been s.esn, n.ra.d suggested that 

someone who ls familiar with the device· might explain its 

design principles and operation • 

. MRo MILLER· suggested that this item be included in the 

second report of Sull> ... Comm1ttee "B''o 

ADMIRAL STONE said that he thollght Oro Sia.lcov and Cap• tain Safford should examine the f'acta 11 ·· and bring the matter 

up at the next meeting. 

MRo FRIEDMAN inquired if' the Committee were agreeable 

to including this item in the next report of SUb•Comm1ttee "B"c. 

The· Committee so agreedo 

The 3xecut1ve Committee considered the first report of 

Sub-Committee ''B'' .in its entiretJ'o As a. result of this con ... sideration it was ac~eed that the following changes would be 

made (Comments are included \'lh$re appropriate): 

9 

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lo Title· - Change-to read: "First Report of Subcommittee 10BllV to the Executive Commit~eeo" 

2" Paragraph la "" amend t·o read: . . 

eo "Low EChQlon (1ncl~d1ng mioor.war. vesselsJ Telegraphic systems.- nclu.d1ng combined assault codes ~nd 

tao~1ca1 17stem.s to~ all mllltarr . SeI":'iCeS c . 

3o Paragraph 2 - amend to read as re>llows: 

· i•2. During_ the course ot the dis~usslon ··and 

demonstra~ions 33 crypto s1stmns were consideredo 

Technical descriptions ·or 29 of these are inclQded 

in the appendice~ as follows: 

MACHINES CIFAX CI:r>HOmt HAND SYSTEMS 

a" AFSAr4 7 f o ASAX 2 ho. ASAY 4 mo ASAD·l 

.b,, AFSAM 9 8!> NRL Cif'ax io ASAY 6 

UoSo c., 7 Rotor BCM Jo. ASAY 8 

. do '"l>CM'11 ko .AN/TRA 16 

no Running Key Cipher 

e c MOM· l.o .TSS 

Oo 1.::.ercur,y u~ METFAX v o · llallJuark .Y 0 P~ayf'e.x 

Po concert VI,, sorcerer Zo Linex 

U\)Ko qo Rollick Xo D 10 aa .. Cursex 

ro Singlet bb·~ Otmetco 

So Pendragon CCo Alametco 

.to OOP 1 

"Four others, tho ASAM 2-1, the CCM, the Strip Cipher, ·and 

the M-209, have. no de~ar1pt1o4S. attached because of their 

familiar status in both countrieso Brief mention was made 

of a modif lcation ot the M-209 which has been proposed by 

HagelinQ A description which he has submitted is included 

in the appendixo The appendix also includes soma miscellWJ.eous notes on general 1temso 9

' · 

4n Paragraph 3 ~ nmend to read as follows: 

"3., None of theee cryptoa;rstems wau subjected 

to serious deliberation as ter as -security ·10 con~ 

cerned and on.ma.111' of them·no se~urity studies hav• 

.ret been madeq · It is the aim of the Sub-Committee 

that.these .systems shall all receive security oval= 

uations during tho interim bet\veen the close Qf this 

c.c_n:rerence and the opening ot the nexto" 

10 

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-· 

5., Pa~agraph • 4 - add the following sentence at the ~nd 

or· the parasraph: 

"This. agre.ement wo11ld lirlli t the number·. ot 

difterent types of rotors empioy~d and th~reby 

f'acilitate the interchangeability bet,1e.en, :UoKo 

and U oSo SOUrCSSo" . 

61).· Paragraph ·5A. ~- .ainen.d to read in pa-rt· as fol.lO\'IS: . . 

·"Ao· Lmv Echelon (including Minor ·:rar Vessels) 're1Legrapb.1.!t9 systems .... includin~f combined 

u.ssnu.1t·· codes and tactical systems for all 

military Serv1cee9" . . 

7n Paragraph 5A) .... amend to read as follows: 

")"' ·.10 ·note ·that both US. and UK. htive a 

number or· new machine systems.under devolpp- · mente but that none ot these is li~ely to be 

availHble tor general combined use before 19S4o" 

8 ... Paragraph 5.Al+a - am.end to read as follows_: 

"ao No machine system is likely to be 

available tor general combined uae before 

1951.a..-" 

94) Paragraph SA4b a;o delete "devices" and substitute 

"systems'' e . 

lOo Paragraph SA4o •enclose PCM in.quotation ma~kso. 

llo Paragraph SB2 - amend to read as foll~ws: 

"2o '.'Te recommend that a machine system of 

at least equivaient security but taster ~han 

cursex ·should replace itp when '1Vuilable, and 

that s11ch a system should be selected within 

the next 12 monthso Possible devices are: 

"PC?4'' 

DUP l 

AFSAM 1 

·MOM" 

12a Paragraph 5C3 - amend to read as tollorm: 

"3o ~Ve note that with the exception of th~ 

Air-Gro_und $ystems no.ne of. the syst~ms under' de;.. 

velopmen.t is likel.Jr to be avullable for general" combined use betore 19S4o· '' 

ll 

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13~ Paro.graph 5C5a_ - delete '', soy,, 19530'' and 

substitute "1954" '' 

14., Par~graph SC5b(2) - add "Pencil and paper system. tor very low 

echelon pur~osesnR 

lSo ·Paragraph 5CSb()) "" delet·e -"'(to be described 

un:ler Item E)"" 

16~· ParaBraph 5C5c(2) .... enQ.lose ·PCM it>. qu.otntion markso Add tollowinc to 

end· of' listg "Pencil and 

paper systems,, '

9 

l?o Paragraph 5C5c(4) - amend.to read as follows: 

. ''(4) Cifax ... ASAX 2 

NRL C1f'ax 

Jl.t!:'l'I' AX" 

180 Paragraph SC5c ... delete "this cutegor,y" from 

the Note at the end, and substitute ~·category ( 4) ''., 

190 Paragraph 502 = .amend to rend as tollows: 

"2., ~·1e note· thnt both the UK. and the U..'30 have 

a number of new systems under devel~Pment but that 

none ot these is likely to be av~ilable tor general 

combined use before 1954~" 

20~ Paragraph 5D3a - delete ... , say, 19530 19 and sub""! · stitute "19S4.; '' · 

2lo Par1.1graph. SD3c(l) - insert ''can be u.sed only" between "attachment;., and "over'' o 

220 Paragraph SD3o(3) - delete "'tachical" and sub ... stitute "tactical''., 

230 Paragraph 6 - amend to· read as follOiVS: 

"69 The Sub ... Committee·has the following recommendations to make: · 

"ao That immediately and on a continuing basis, there be complete interchange of the technical ·details .of the s1stems disc11ssed in this 

exploratory conterenceq·. This should include 

technical visits·~ · · · 

12 

+OP SECRE"f 
oi I. •• 

• . "bo That discussion and. interchange of 

technical-intormation on o~rtain other items or 

combined imterest 9 such as the security aspects 

ot IFF aad authent~cation syst~s, be authorizedo 

"co Thot·sec111rity eoqaluatio.rns ba made and 

exchanged .on all items discussedo 

"do T'hat a oopy of the tiwil ·-report or .the 

contereace· be submitted to th~ UoSo•UoKo JCEC and 

that· the ·u .s.•tJ 11 lto JC.EC be requested to con·s!der an~ resolv&'as a matte~ ot urgency the operat!o4al requirements in. all fields ot Com~ined Crypto- .graphlc Oo.m.wdcatioD.s.. · 

. ·. ''e., That there be annual ·co.n.ferences on 

thees sub Jee.ts tor the next· toant ·years-. to be 

held alternately in London and ia.Wae.hington, the fir~t. of these to take place in London in 

approximatei, nine months time~" · 

·with respect to future ~eatings, I.mo MILLER suggested that the .Exeeutive CoD111ittea m.eet af'ter sub•Committee ''B" had 

made its second report so that if the working: group had aa.y- thi~c: of interest to report, they CQuld do so at that timeo 

Be added that it might 'tie desirable to pass a copy of the 

conclusions to the COMINT ·Conference tor their in:rormatio·no 

lle pol.nted out that he saw no need tor t.he· I~xecutive com .... mittee to meat again until after the Sub-Committees had sub~ 

mi tted their next reports, ·.which would be sometime· atter 23 

October 19500 · · 

MR .. FRtED!-.iAN inquired 11" there tvere. a.11y obJ~ctions to 

MrQ Miller's suggestions4 

There were noneo 

The meeti~ adjourned at 16256 

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.!.-·-- -.:!,,r 

·;;. - .. ._ .. 

1 

MEMORANDUM FOR·D!E MEMBERS OF THE EXECUTIVE COMMITTEE: . . 

Subject: Tentat1we. MiAQtes ot the Third·Meetiqgo 

lo The subJect .minutes are forwarded here• 

with tor your conaiderationo 

2~ Please udv1se the Secretariat 9 located 

in Room 19=2111 u. Bo Nav7 Secur1t1 Station, (Tele= . ·phone: Code 1)19 exte.a.sion 60354) of your comments 

fJ.lld/or concurreaceo 

~~· J·o W o .PE,ARSON 

Ho Do JONES 

Secretariat 

TOP SECRET 
BRITISH· .... UNITED STA.TES CO.M'llUNICATIONS SECURITY CONFERENCE - i 

/ MINUTES OF /. 

I I THE Tm.RD MEETING OF TS BDCUTIV'E COMMITTEJ!: 

j' ~ The Third lllaet111g of the Ezeou,1va COllllliittee.ot ·tlle Bri• 

/ / tish • United S~ates C,,mrawdcat!ou Saourit7· CoWfer@noe &s 

/ held at .1400. ·on ll October l9~m 1D Roo.aa ·1212 11 u. So Nav,v · 

1 ·secu.rity Statio~, Washi.o.gtoa.-9 D. O. 

I 

United States 

Mr?_ 1~1(' Fo Friedman, Chairman 

Rear Admiral ·Earl Eo Stone, 1JSN 

Captain L.l. F o Saftord8 'USN' 

Captain Jo So Harper., .·oSN 

Lto Colo ·Go Vo Johasoa, 'USA .Lt~ Colo Ro Ho Horton. USA. 

Major·Go Eo Parr, USAF Dr~ Ao Sinkov 

United Kingdom 

"f.Jlro To Ro VI. Bu.rton .Miller 

Captain, ~he ~arl Cairas 8 ~oN~ 

Brigadier John. Ho_ Tiltman.· 

. Secretariat 

. 

Lisute.ue.nt J. lf.~ Pearsoii 9 USN 

Misti Catberiln.a llJl.o J'o.Rulsca 

TOP SECRET 
ITEM lQ APPROVAL 01'' MINUTES OF FIRST AND SECOND MEETINGS: - MRo FRIEDMAN inquired it there were alll,f_comments or 

c1Jrreotio11s:· to ·be made to the Minutq1e ot the First and 

Second Meetingsc 

There ·were no!ile.o 

The·oommittee approved the m!aates of the First and 

Second -'!eet iJlgs-o · 

MRo FRI.IIDMAN made ref'.e~ence to a part .of· the minutes of 

the First Executive Meeting which ~ad ·as follows:· .. .. . .,.o u a. making r®terence to the b.ackgroun.d statements 

that he had read ut the First Moet!Kl8 or the Plenary Co.mrtli ttee, Mr·o Friedman ·inquired ·if 'the BJ"i ti sh Delega~ion. had any objections or.comments to make, 

particularly with regard to the ·article.a qu.o·ted from 

the agreementso '' 

"Mro J.:illcr replied that his Delegation had no comments on the articles q~oted from the agreaments 9 but that they wollld like to ma~e certain· that they 

u11d-erstood the.ra., " · 

He inquired of. Mro Miller as to whether he had had an 

opportunity to study the articles :in qu.estiono. 

LRc MILLER replied :ln the aftirmutive, and stated that he 

would like to make certain that his interpretation ot tha articles was the same as the :U o-S·., interpretatlol!.a He continued by 

explaining that 1 t was his undel"stending 11 ·thu t if British. Author! ti es desired to copy something fro.ril· a U ..-S·o· plan or d.evioe, 

they could do so without ·waiting tor detailed negotiations _be-. 

·tween the two Governments, provided that arrangements were .made 

with regard to patent rigbtso 

.lVIRo FRIED!J!A.N stated ·that he tb.OU@'..ht Mro Miller was co.rrect, 

but added that he would like to review Article ·VI as follows: . . 

"1<> The two contracting Governments will negotiate appropriate arrangements between them respectlng respon= sibility for claims tor tne use or infringement of inventions covered· by patents or patent applications 11 · 

trademarks, or copyrights,· or ot.be.r similar claims 

·l 

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"arising from .the u.se of devices a processes·,. or 

technological i.Dformation in connection with equip= 

me.mt·, mater1ais or serv1Ges furnished pursuant to 

·this ··Agreement• or f'lllrds~ed. i.a the interests of pro-. duo t1cu1 undertaken by agreemeatt· between the two co.a.-

tractilllft ·GOVQt·rmnenta on iapl\.em.entatiol!l ot the pledges 

or selt-help·aDd mutual aid omntained ia the North 

Atla.ntic·Treatyon 

He ccatin~ed b1 sa1iag .that he had requested t~e patent s~ction of the. Officie or R@searoh am Dev~lopment to make a 

study whia·h would help to clarlf'J' 111011' questions which might 

ariseo He s~~ted that· he had Mt· yet rec.ei~ed the report, 

but would Jlhaive ·it reiad7 for presentatio~ at the. next 

meeting of .the Exeouti:~a C·oDJJ:li tteeo . . . 

CAPTAIN HARPER remarked that· he tho~ght ttat it was 

generally considere·d that expeJrimentation was the swne as 

research and as suoh did not come·with1n the scope of pat~nt rlghts., He ·added that. patent ri·ghts· pertained to 

·construction· or use. tor com..'!lerciall purposes"· a .~ • 

MRo·MILLER agreed11 but stated that he was.of the opinion 

that the matter went :f&li.rth.er .than that; he explQ.ined that he . , thought that one Gover.a.ment might copy the .patents .of the ot.b er., 

as l_ong as the po.tent :copied. \'18re uaod for p\\J.rely governmental · serviceo · He continued "by ~ay!ng that patent· r1~hts were involved when a Government sells tho ptitent ~o a commercial firm" 

or when they try .to. profit trom it.,, · . ' 

i:da., FRIEDl'JlAN commented thut tho u.ndersta.nding t.hut U o.So 

Authorities had with respect to the· protection ot i.Dformation 

was thnt it v1ou.ld not be published in a ·jourlllalo.· He stated 

that he thought.the arrangement was of a reciprocal na.turer. 

that is,_ if the British Govermnent desired to incorporate· certain things tor purely" British Governmental use from ideas 

covered by UoSo patents 9 then the UoSn Government would be 

free to mate similar use of i~eas co~erad by Britieh .patents~ 

CAPTAIN HARPER stated that he was.m 11 t sure if P.:ro Friedman's 

remarks were e.imtirel.v correcto He pointed ou.t that some patents 

were taken out in an individual~ name 8 and the Government was 

given full and tree use of them, but that ~his didn°t· mean that 

the oppos:l te ·government would have free usage of themD lie added 

that probably the same thing was true from a British standpointo 

CAPTAIN SAFFORD remarked that the Goverwnent had the ri~.b.t to· transfer the use ot a patent to another Government 

on its own termso 

2 

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• 

MRo FRIEDMAN stated t~at there was a paragraph in the Lend= 

Leas.a Law to the effect that the UoSa Govermnent would undertake 

to protect the rights of invento~s under the Le4d=Lease arrange~ 

ments c· .ne added that he tho~ht it ll· question for the legal 

p·eo ple to answerv . 

. CAPTAlN HARP.Im statsd1! t·or the sake ot t.b.o. record, that 

he was of the opia!on that:the usage o~-a~ idea tor research 

purposes ls u.o.restric.ted except as to pG!blication fQr the sake 

ot securit.r'e 

. MRo FRIElJilN stated ~hat he thought 'that, in alJl1 event 11 

ma111 .Precedents c.culd be found from World ~far Il. 0 He reiterated 

that he ~o~ld have the report from the legal seotion.which he 

would pr"esE>a.t to the .Committee at the ne;xt .Meet!~o 

TOP SECRET 
ITEM 2o CONSIDERATION OF TIL~ SECOND llli"'PORT OF SUBCOMM:ITTEE '

9

A". 

MRo .FRIEDMAN request~d Captain Safford to present the 

second report of' Su.b-Committiae ''Aw o 

CAPTAIN SAFFORD mi!Called that the f lrs~ report ot Subai 

Committee -"A99 had CU~VS:rt'l!Ul the enorrpticn of lltsrl:li textso He 

re.marked that the ll!ext 1 tem that the Committee. had consid1ired . was the ques"'io.11 of the ·enceyptio.m ot' owmerats plus 11r• or· 

''Slash" tor purposes of wea~her, ·aml pointed out that. the comr.iittee had ·agreed that the ·neicessar1 ··f'a~ilitJ should be pro- ~ided .as sooD as it 1s:ava1la~le, .where req~ifedo . . . 

With respect to Encryption of Letters •. "Plus Numerals, Plu.s 

Certain Qther Teleptiinter Characters, Captain SAFFORD stated 

tha.t the Comrn:i itee ·had not been able, to come t.o ·comp.late agree= 

ment due to. the fact that differ~nt operational requirements 

were involved,, He continued·. by saying that a possible compromise 

between these conflictin~ developments bad recently been.put tor~ 

war4 from the U o So. side 11 and a working party consistine or himself 11 Commander Seiler, Commander I.inn 8 Ltl) Col-~ .IIenn-Collip.s9 and Mr" Jolley hud be~n appointed tQ :i.nvestiga·te the proposal" 

He added that on Friday, 20 Oct~ber 1950 11 . he pl1inne_d ~o escort · the Sri tish members .. of ·the working party on a vioi t to the Tele-. 

type Corporation where.the PCM (CSP 4700) and the new Off-Line 

Automatic Equipment (CSP 5000) were .under development, and.that 

the working party would. resume its discussions on 1.:ond~ 9 2) 

October 1950 11 and would report in due-" course to Sub ... com:mittee 

"A" .. He pointed out thut t.his was the only point· to be .cleared 

up, and tblit it v.ould necessitate the rocon~en!ng or sub-Committee "A" for the purpose ot rendering a final report a.ad re·-

commendations on this point alone; he ~ema~ked that .if no ti.rm 

understanding could be reached, then Sub-Committee 19N' woilld. 

have to submit som0 kind of a recommendation to defer decisioa 

for approximately a yearo 

In the way of explanation, Mllo l~LLER pointed out that Bri= 

tish operational people. had ask~d for enciphetinent· ot the whole 

teletypewriter series, but that the U o S., ·_representatives desired 

the enoipherment·or nwnerals only .. 

. 1-'IRa FRI:!IDMJ\N inquired or Captain Safford if this would · · apply to the BCM.. · 

CAPTAIN SAFFORD replied that it would have application to 

the new BCMo He explained that agreement had been reached on 

the BCl:..1 principle, and that it .had been accepted as far as the C~P 4800 was concerned.. He pointed out··thet. the BCM had· been 

acoepted 9 and that it would be .sent to London with no strings a.ttachedi> .but that th1s other matter was in addition to tliat in 

4 

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•• · that ft was being recommended that they go one step further, 

and . make provisions tor the enc!pherme-nt of numerals, "X'' or 

"SJ.ash'' o · 

MRo 7.411.LER pointed out that British operational people 

h•&d asker~ for a machine which would provide· encipherment of 

upper ani lower ca.ses-11 both letters and numerals, but that 

the Uos~ operational people did AOt desire full teleprinter 

ooeommo".iations im that they were onl1 1mtsrested in the. 

-1.:'«lwer r;asec. · · 

1 · . CAP.TAIR. SAFFORD commented that the next ·report· ot ·Sub.;. 

;Committee -~A~ wQuld d$al with the matter in greater detailo 

/ Be pointed _out that the Army and Navy desired tt · smallelt" and 

' ligt.iter machiae., and that• ·particularly from a Nav1 stand- po~~nt, it would .be advantageous. to use the same machine tor l~~ as well ~s ·high ecbelon ~ppl!cationso 

/ .. ' ADl.URAL·. STONE reJUr:ke6l 9 that since this matter r~mained 

/to be cleared. up 9 he saw _no· reason tor having the Nxecutiva 

./ and Plenary }Jleet!Kllgs so.ho dulled tor Frida.Ya 

.r CAPTAIN SAFFORD commented ·that while the. remaiaing point 

was a small one in,itaslf 8 it was a ~el"l' 1mport&Alt oae with 

respect to the ocnstructio.n ot the ~c.hine·a 

DRo SINKOV sta~ea that since the workiims group would deal 

alto13ether with the exchange or 1.atormation. o!li the COMINT sida·fl 

it might be well to close the work of Sub=Com:nittee "B" by 

transferring the teleprinter problem to. the next Oonferencen 

J.!.Ro FRIEDMJ\.N replied that he did not believe such action 

would ·be validw since the COMSEC Conference had been authorized 

by the Joint Chiefs of Staff on.ly tor the exchange ot cryp to.;..· 

graphic p~inciples, and not for action in regard -to a replace~ 

ment for the. CCMa This v:lew was shared by ·o.ther members ot 

the Executive Comm1tteeo 

WJto FRIED!r!AN then stated that if it were agreeable to the 

Committee the Executive and !'le./lla.ry Committee Meetings scheduled tor 13 October 1950 would be cancelled ... · . 

The Committee agreed,, . 

.MRo MILLER stated that it was.his understand'ing that after 

sub ... committee "A" had submitted it&· )rd report, and· after Sub ... Committee "B" had submitted its 2nd repol'ts then there would be 

a final meeting ot the 3xeout1ve and Plenary Committees~ · 

1.'.Ro FRIEDMAN agreed, aod inquired it the Comm! ttee a~ 

proved the Second Report of Su.b-;..Comm1ttee ".A". 

5 

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:- CAPTAIN HARPER stiggested that the use of PPM in the .re..,. 

port might be confusing to both Br! ti sh and U o So .re pres en ta ... . tives.. He pointed· ou.t that PCM me.ant "pu.lse cod:e modulation" 9 

which was used in a considerable number of machines~ 

MR,. MILLER re1na:rked that 1:t quotation marks v1ere placed around PCM it would be acceptable to himo 

. MRo FRIEDMAN suggested that the- abbreviat~.on P.~M be 

used i.n place of PCM; he requested Captain Safford .to comm.ento 

CAPTAIN SAFFORD explaioed that the machine bad been called 

a ininia.ture o iplle·r ·machine 9 and that the word. "portable" haci · been used to describe· the machine due to the lack of n better 

word., He.added that they had not been concerned with the "plllse 

code modulation'' o · 

DRo SINKOV suggested that the.parens be removed from 

around "CSP 1+700'' 11 . and that PCM be. _deleted altogeth_ero 

ADMIRAL STONE remarked.that he had seen the title BCM 0 7 

used in one· of the pap~rs 11 and suggest·ed that poss1bly BCM-7S 

would be an appropriate des1gnationo · 

CAPl'AIN.HARPER observed that SBC1K mi~ht be a better 

designatlo.no · · · 

CAPTAIN SAFFORD stated that the-designation used in con=· 

trfJcts. with the Telety_pe Corporation was PCMo 

DRo SINKOV pointed out that PCM wns used in the report of Sub~Commi ttee !'B" as well as in the report under cons.iderationp end that he thought it mieht be well to be consistent throughoUto 

MRo FRIEDr.fAN inquired if the Committee were acr.eeable to adopti~g ·Mr,_. Miller 11 s suggest1on9 · vizl) that ·quotation, marks 

be placed around th~ designation PCM throughout both reports" 

The Committee agreedo 

MRo FRIEDMAN then asked if the Committee were agreeable 

to accepting the Second ·Report of Sub .... Co.mmittee ''J\." 9 as amendedo 

The Committee agreed to accept the report as ~end~d~ 

MHo MIL~R recalled that a suggestion had been made that 

·a common title· for the ?~rotor BCM crypto=technique be adopt~d&· 

and tha·t the codeword "BRUTUS" had bee.n. propos~d.9 He explained that he had signalled GCHQ, in the premisesl> and had reoeived a 

favorable replyo ne added that he felt that this matter came . under.the cognizance of Sub ... committee "A" but st~ted that it migh~ be well for the Executive Committee to know that the 

word was acceptable to the Britisho 

·6 

.+OP ·sEC.REf 
• 

CAPTAIN SAFFORD stated that he could not state definitely, 

but that it was his understanding that "BRUTUS',' was. being used. elsewhe~e in the Uo So .Armed Forces, however 9 fi.e.- addecl that it 

was not used cr7pto-wiseo · . ~· 

ADMIRAL. STONE suggested tha~ the u·o So delegation accept 

the word ''BRUTUS"· su.bJect to determ1n.1ag w.hethsr it is·. already 

being used,, 

CAPTAIN SAFFORD recommended that the word "AJAX~~- bo adopted 

as the designation tor the present CON in a111 of its fo·.rmsa He 

inquired whether JU'o Miller could req~est clearance on "AJAX" 

as well". 

MRo MILLER replied in the aft1rmative 9 stating t.b.nt he 

would do so by sig.aaliJ 

?Bao FRIEDMAN inquired it the Committee were agreeable ~o 

proceecJ.1.ng on the basis that "BRU'IUS" would be adopted as the 

designation for the 7-rotor BCM crypto-technique~ subject to 

the determination that no conflict 'exists in Uo So teX'm.inology; and that "AJ'AX" would be adopted as the designation tor thf,i 

present CCM in 8111' of its formsp subject to the detel"l!linntion 

that no conflict exists in British terminologyo 

'flle Co.c:imittee so agreed~ 

CAPTAIN, TH~ EARL CAIRNS inquired if the aforementioned desi~nations would be stam_ped on the machineso 

O!\PTAIN SAFFORD replied thf:l.t theY' would be u·sed in an 

unrestricted status in correspondence, on ke1 lists, instruc= 

tions 9 and name plateso · · . 

r-JIR& MILLER inquired if the word "AJ'AX" would signify the 

)•rotor COM crypto-technique employing stan~ard rotors with · non-rotating.cam-contourso · 

. DRa SINKOV replied in t.he negative 6 explaining that '~3Axn 

denoted the basic crypto SY'Stem regardless ot the rotors 

1.avolvedo · 

M.Ro FI~IEDMAN remarked·~. that certain 1\J"AX"crypto techniques 

might be interchangeable with another '~J'AX''using· the same cam 

contoursQ He ·pointed out that it one didn·11 t use them and the 

other did9 ·1t might result in co.afusiono . 

MRo MILLER commented that it had been ·agreed that roto~s 

should be standardized insofar as the BOM was concernedo He 

explained that if they accept the PCAf machine and adapt it ·to 

work with tho SINGLE'l\1 tl1en they would not want the respons1- bili ty for standardizing rotorso 

7 

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DR" SINKOV stated that he though1li that }Aro PAiller wa.s 

speaking of two wholl,1 different conoepta ot the word "BRUTUS" a~ applied to. a cry1;ttr sy:,:ste,m Which u.ses a different m.~chanism .. He added that it· .might call tor ditterent size roto~s~ 

MRo MILLER repU.\Bd t!iat VVBRUTDB"· ~as !JDlployiad ,in both 

the POM and BOM, a.ad. inquired if it were agreed that rotors 

would be 1Bterchangeabls to~ the BCMo . 

·. .YRo FRIEDMAN. inquired of' Mr., Miller it .he desired a note · in the rec~rd to the etteot ~hat he (Mro Miller) had no commitment to make.with regard to the interohan.geμbil:!ty of BCM and 

PCM rotors.. . 

MRL' ~LLER ~plied ia the aftirmati,,.eo 

CAPTAIN SA1FORD remarked th<it as rar as the 'FCIJI was concerned, th$r&. was .110 reason. for believing that the rotors would· 

be any· dirferen·t trom un.vthing else., 

8 

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·---------------
ITEM .3\'o · CONSIDERATION OF TRE.FlRST REPORT OF SUBCOMMITTEE "B'9 

.. 

r.m.~ FRIED?li\.N requested Dr. Si.nlto~ to present the· first 

report of ·su.b ... commlttes. "B"-o 

DRe SINKOV stated that he regretted that the report ~ad 

not bee.n.nvaila.bl.e at an earlier elate, but explained that the 

·last meeting of the su~Comm.ittee had been held. the previous daf o He pointed out that th~ repcrtg was nQt 1et complete in 

that brief descriptions ot the equipaents m~ntioned were being prepared, BAd·woul4 be attachea to·the repo~ as appendiceso He then read the repor.t to .the Committee. · 

. 1.:aki.rng reference to paragraph 2 or the report, Captain SAFFORD inquired if there were any reason for OIQ.itting the 

Stromberg-Carlson TSS Ciphony System f'rom··th~t list. He 

pointed out that there was no technical description of the 

equipment. ava~lable at this timeo · ·. 

MRo MILLER inquired it there would be an opportunity· to disc~ss this equipment ·or to demonstrate ito 

CAPTAIN SAFFORD replied that it·would be ver1 worthwhile 

to have Lto Coln_ Hemi•_Collins e:x;a.mine the equ1pmo.nt. . . 

DRo SINKOV pointed out that a number ot equipment~ h~d 

been discussed without having been seen, nnd suggested that 

someo4e who is familiar with the device· might explain its 

design principles and operationo 

:MRo MILLER· suggested that this 1 tem be inc ludod in the 

second report of Sub""Co.mmittee 19B'' o 

ADMIRAL STONE said that he thought Oro Sinkov and Cap- tain Safford should examine the facts,:· and bring the matter 

up at the next meetingo 

f.(Ro FRIEDMAN inquired if the Committee were agreeable 

to including this item in the next report of' Sub-Committee "B"c. 

The· Committee so agreedo 

The 3xecut1ve Committee considered the first report of 

Sub-Committee "B'' .in its ent1ret70 As a result of this con"" 

sideration it was ag~eed that the tollowi.ag changes would be 

made (Comments are included where appropriate): 

9 

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lo Title ... Change to read: "First Report of SubCoounittee •~svv to th~ Executive Commit~eeo" 

2" Par~raph la - amend t-o read: 

ao "tow Eoholon (including minor.war. vesse1s1 Telegraphic systems - 1n= 

cimdins combined assault codes ~nd 

tactical ·systems for all military ser=Vioes " · . c . 

)o Paragraph 2 - amend to read as follows: 

· n20 OU.ring the course of the d1s~ussion ··and demonstra~ions 3) crypto systems were consideredo 

Technical descriptions ·or 29 of these a.re included 

in the appendices as follows: 

MACHINES CIFAX CirHONY. RAND SYSTEMS 

ao .AFSA?./i 7 f o ASAX 2 ho. ASAY 4 mo ASAD·l . .b .. AFSANL 9 g~ NRL Ci1'ax io ASAY 6 no Running Key 

u 0 s 0 c 0 . 7 Rotor BCM 3.; ASAY 8 Cipher 

·ao "PCM" ko AN/TRA 16 

e., MOM· 1·0 .TSS 

Oo ~ercury Uo METFAX Vo ·IIallmark .¥ 0 Piayt'ex 

Po Concert Wo Sorcerer Zo Linex 

UoKo qo Rollick Xo D 70 f::Ul~ Oursex 

ro Singlet bbo Otm.etco 

So Pen.dragon CCo Alametco 

"iio ·IlJP l 

"Four others, tho ASAM 2-1, the CCM, the Strip Cipher, and 

the M-209, have no descriptions attached because or their 

familiar status in both coWltrieso Brief mention was made 

or a modif !catioa ot the M-209 which has been proposed by 

Hagelino A desor1pt1on which he has s11bmitted is included 

in the appendixo The appendix also incl11des some miscellaneous notes on general item.so" · 

4~ Paragraph J ~ amend to read as tollO\vs: 

")o None or theee cryptoeystems wau subjected 

to serious de.liberation as f'ar as -security ls concerned a~d on.many of them no security studies hav~ 

yet been made<> · It is the aim of the Sub-Committee 

that these ·systems shall all receive security evaluations during the interim bettiveen the close qf this 

c.onference and the· opening ot the nexto" 

10 

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... 

• 

5 ,, Pa~agraph 4 .. add the following sentence at the end· 

or th~ paraeraph: 

"This ·agreement \'lould lirtli t the n~aber of 

dii'f'ere.a.t types ot- rotors employe_d a~ad · th~reby 

facilitate the interchangeabilit.r betw.e:~n UoKo 

and U eSo SOU.rCSSo" . 

6 .. · Paragraph ·SA.: ... : amend to read iii part as f'ollows : 

"Ao. Lew Ech~d.o.n. (including Minor ·:tar Vessels) Telegrap.tJ,io systems ... lncludi.Dg combined 

assault·· oOdes and tactical systems tor all 

m111 tary ssrvice~ 0 Ill • . . . 

. . 

7.. Paragraph 5Al .... amend to read as tollo\1s: 

")o :·10 ·note tho.t both US. and UK. have a 

number ·or new machine systems under devol~p- · .nwnte but that none ot these is 111cel,v to be · availf:lble tor general combined· use before 1954 .. " 

8,,. Paragraph 5A4a - amend to read as follows.: 

"a(I No machine system is 11.kel.y tp be 

available tor general combined use before 

19540" 

91l Paragraph 5A4b - delete ''devices" and substitute 

"systems"o 

lOo Paragraph 5A4o ... enclose PC14 in quotation marks.o ., 

llo ParaBraph SB2 ~ amend to read as follows: 

''2~ '.'/e recommend that a machine system or 

at least equivalent secarity bUt. taster than Cu~sex ·should replace it, whern avuilable, and 

that such a system should be selected within 

the next l~ monthe.o Possible devices are: 

"PCM'' 

DUP l 

AFSAM 7 

·MOM" 

12~ Paragraph 503 - amend to read as follows: 

·"3o ·.;1~ note that with the exception oi' the Air-Gr~und systems none ot the syst~ms unde~ de~ 

velopment. is likely to be avu!Jlable for gene·ral' combined use before 19540 1

• 

ll 

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. . . 

• 

130 Paragraph 5CSe. - delete "• say, l953o'v and · substitute ·"1954,. 'v 

l4o Par~graph 505b(2) ... add "Pencil and paper systeD. for very low 

echelon pur~osesn" 

lSo Paragraph 505~(3) 

16~ Paragraph 5CSo(2) 

~delete ~cto be.described 

un:J.er Item E) ''" 

•· enc.lose ·_PCJ.~ in quotation markso Add rollowinc to 

end· of list~ ''Peno il and 

paper systems .. ,, 

17~ Paragraph 5050(4) - amend.to read as tollows: 

· '' (4) C!t'ax - J\..CJAX 2 

NRL Citax P~TFAX" 

180 Paragraph 5C5c - delete "this co.tegor1" from 

the Note at the end, and substitute "catego17 (4)"o 

190 Paragraph SD2 .. ,. emend to rend as tollcws: 

"2-o ,:le note thot both the Ult and the U.S .. ho.ve 

a number ot new systems under devel~Pment but that 

none of these is likely to be av~!lablo tor general combined use before 1954~" 

20~ Paragraph 5D3a - delete ", soy 11 19530 rv a.nd sQ.b~ 

· stitute '

9

19S4o '' · 

2lo Paragraph 5D3c ( 1 J - insert ••can be used only'' be~ 

tween. "attachment;., end ''over''_c. 

2211 Paragraph 5D3c (3) - delete "'tachical'9 and sub= 

stitute "tactical"o 

2)o Paragraph 6 - amend to· read as follows: 

1160 The Sub=Committee·has the following recommendations to make: · 

"ao That immediately a.ad on a continuing basis, t.here be complete interchange of the tech ... nical ·details- .of the systems discussed in this 

exploratory cont.erence;,.. 'J;'h!s should include 

technical v1s1 ts~ ·. · 

12 

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lo I • .. 

• . "bo Tha.t discussion and interchange ot 

technical information on certain other items of 

combined !nterest 9 such as the securitr aspects 

ot IFF aad authe~tlcation syst~s, be authorizedo 

eec o 'rho.t ·.security evaluations be made and 

exchanged on all items discuesedo 

"do Thut a copy ot the tinall. ·-report of .the 

coaf'erellCe be submitted to th~ UoSo-UoKo '1CEC and 

that the U.so~UoKo JCEC be requested to consider 

.ana reso1ve·as a matter ot wrgency the operational requirements i~ all tielda of Combined Crypto- .graphlc CommuicatloD.sn · 

. ·. "&o That there be annual conferences on: 

these aubjec.ts tor the ne:xt four· 7ears. to be 

held alternately in London and· i.o.Waohington 1 

the tirst: of these to take place 1n London in 

approximatel111.i.ne months time'!" 

With respect to future meetings, MRo MILLER suggested that the .Exeeutive COllllllittee meet after Sub-.Committee ''B" had 

made its second report so that if t·he working.· group had any- thing or interest to report, .they cQuld do so· at that timeo 

He added thut it might tie desirable to .pass a copy of the conclusi~ns to the CO~llNT ·Conference tor their inti:>mationo 

He pointed out that he sow no need for the· Executive Committee to meC3t again until after the Sub-Cmr.mittees had submitted their next reportsg ·.which would be sometime· after 23 

October 19500 · · 

MR .. FRJ;EDMAN in.quired if' there were.any obJ~ctions to 

Mro Miller's suggestionso 

There were noneo 

The meeting adjourned at 16250 · 

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Bmcut1ft c..1, ..... ,~, ll.IH», 11 o.tober 19'0 

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BRITISH "" UNITED STATES C.O&~f:4UNICATIONS SECUFi.lTY CONFL'l\ENCE 

MINUTES OF 

THE S.EX:OND MEETING OF 'l'HE EXEC.UTiw COMillITTE.E 

The Second Meeting of the Executiwe Committee ot the 

British ~ United States Communications Security Conference 

was held at 1000 on 2~ September 1950 in Room l7 ... 318p 

Uo S. Nav1 Secu~itj Station, Wash1ngton 9 Do Co 

Representatives Present· 

United States United Kingdom 

1 

Mr. 'II. F •. Friedman, Chairman 

Colonel s. P. Collinsp tJSA 

Captain L. F. Safford, USN 

Captain J. s. Harper, USN 

Colonel R. c. Searsp USAF 

Captain, the Earl Cairn®, Ro~• 

Lt o C·olonel C. Ao Henn-Collins 

Commander J.,R.Go Trechman, R.N. 

Brigadier John T. Tiltman 

Lt. Colonel R. H. Horton, USA 

"Lt. Colonel .G.. V.. Johnson, USA 

Dr. Ao S1nkov 

Secretariat 

Lieutenant J. W. Pearson» U.S.N. 

Mr., Ho Do Jones 

Miss Catherine Ma Johnson 

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A T ~Ji:. I~:Jl§..!!63 • 

• I UP !'Jt:C~t:T . 

ITEM 1. CHAmMANSHIP OF COMBINED EXECUTIVE COMMITTEE 

MR. FRIEDMAN stated, for the record, that the Chairmanahip 

f'or this particular .meeting had been changed, by agreement, from 

Mr. ~1ller to himself. 

ITEMS 2 AND 3 - BRITISH AND U. S. COMMENTS 

. MR. FRIEDMAN coil'Dl'lented that the draft agenda which he bad 

prepnred was by no means all-inclusive, but would serve aa a 

basis for d1scuss~on. He· invited the members to bring.up an7 

additional matters which they wished to have considered. He 

"then asked 1r any members of the British delegation wished to 

comment upon general progress of the Conference to date. 

CAPTAIN, THE EARL CAIRNS expressed his opinion that things 

were going well indeed.. He .said. that· the completion of the 

Sub-Committee A assignment had taken rather longer than some 

had hoped; however, he thought the Sub-Committee had done a 

good job. He added that he would have additional comments 

when Item 5 of the Sub.,..Committee B assignment was cons,dereda 

MR. FRIEDMAN said that he thought Sub-Cormnittee A was to 

be congratulated for having completed its work in such an 

exped1 tioua manner. Be refer·red to the minutes of the first 

meeting of the Execu.t1ve Committee, s.tating that he had hoped 

to have ·them available ror consideration at this meeting. He 

assured the members that copies woqld be distributed momentar1 ly, and any propoaed changes· could be submitted at the next 

meeting. 

ITEM 4. CONSIDERATION OF f.EPQI-,T OF SUB-COMMITTEE A 

With regat•d ·to the processing of f'1nal Conference papers MR. FRIEDMAN explained that the ~ecommendat1ons of the 

Conference would be subject to approval by higher authori:ty 

on the u. s. side, in that it would be necessary to subm1~t 

them to the u. s. Joint Chiefs of Staff via t.he Armed Forces 

Security Agency Council •. He commented that this would take 

time but he thought it could be accomplished within· one month. 

COLONEL COLLINS agreed with this estimate,·aading his 

presumption that the entire Conf'orence report would be forg warded at one timeo 

CAPI'AIN, THE EARL CAIRNS commented upon the large amount. 

of work to be done b'y. 1 January 1955, and .said that the sooner 

a firm.agreement could be reached the better. 

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1· 
REF ID:A67163 

efOP SECRET e COL~NEL COLLINS said that it might be possible to foz1

·1;J&rd 

the Conference recommendations in two separate parts~ letting 

the Sub-Comni ttee A recommendaticn·s be submitted in advance of 

the remainder or the Conference report o 

. CAPTAIN SAFFORD explained that the U. S .. Joint Chiefs of 

Staff had already .approved and submitted to the· British the 

proposal f.or adoption or t.ho 7-Rotor BCM. He said that upon · British approval o·r the broad p:ropos·al. 9 1 t ·would be nacessar,-

to obtain additional approval onl} on minor details. 

MR. FRIEDMAN suggested t~t it might be well. then, to 

forward the Conference repor-t in two separate parts. 

COLONEL COLLINS .agreed, explaining that the two separate 

matters had been .combined only for· convenienceo · 

All members appea1•ed to f'avor this procedureo 

MRo FRIEDMAN then stated that, unless there was objection, 

it would be agreed that the report of Sub-Committea A would be 

handled as a s~parate matter and would be sent forward for 

approval immediatel1 after the Combined Plenary Committee has 

reached tinal. agreement \d th raespect to ito · 

There was no objection to this dec1s1ono 

MRo FRI.lmMAN invited the members' attention to the report submitted by Sub-Committee A4 He suggested that each member 

study it briefly before proceeding with a detailed consideration 

ot ito 

"After a· brief study the members considered the report in 

its entiret~o As a result of this consideration it was agreed that the following chanses would be made in the ·report as subo 

mi tted. by Sub-Comni ttee A (Cormnents ar•e included where 

appropriate) : 

lo. Title"'. Change 1'0 raad: "First Feport of Sub-Comnittee A"o 

2 .. Paragraph 7, Line 3 ... delete "Agreements", insert 

nrec0111mendations". (Comment: It was agreed that the 

Sub-Committee could only :recommendo · A~reement vill 

be sought from higher autbor.it;y.) - -

3o Pa:.r·agraph 7b - Change to read as follows: "Except by 

mutual agreement, disclosure of the 7Mliotor BCM 

principle wi 11 be lim1 tad to the Uo So and to the 

British Commonwealth. 'l'he British agi•ee to notify the Uo So authorities when any issue of a combined 

7-rotor BCM system is made to a nation of the 

British Commonwealth.°' 

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~YE1€~E 63 ·:.· 

4o Puragre.ph 7e(7} = Change to read as follows: "And 

s1m1la:r technical matter, • 11 

5. Parar,raph 7e, final 3 sen1;'&ncea - Change to·read as 

follows: "Upon completion of these studies the 

e. 

7. 

a. 

u. s. and the u. K. will exchange technical papers 

through established channels. If necessary, a 

spec1a_l meet1ne ·to ·reconcile ~1vergent views ma1 

·be held in London (or Washington) at some later 

date." 

Paragraph 7t_, Line 2 -. Cha.l')ge "Purposes" to 19 Purpoae". ,. 

Paragraph 7t, Line 2 - Change "Ageement" to "Agreements"o 

Paragraph 7gfl Line 3 ... Delete "Given", insert "l~de 

available o (Comment: Change required for con° 

formance to ex1st1ng law&o) 

9. .Paragraph 7h - Change to read as follows: "Make 

available to the Brl ti sh the tools and dies for · MARK I rotors (for old TYPEX adapter) • " 

10. Paragraph 71 "" Change to read ae follows: "Make 

available to the British the tools and drawings of old TYPEX adapter, new design of TYPEX adapter 

rotors wi~h tires, and parts and drawings for new 

TYPI!:X adapter;." 

llo. Paragraph 8 ... Change opening sentence to read as follows: 

"'l'he following recommendations were agreed upon 

regarding improvement of security ot present CCM . until. supersess1on date< 1 Januar.,. 1955 as proposed 

by the Uo_.So JCS in 2074/2 dated 27 December 19490" 

12" Paragraph Sc "!' Change to read as .follows: "Matters 

such as the rate of supersession and specific times· 

ot supersession are to be left to the established 

agencies charged with such matters."" 

MRo FRIEDMAN stated that the above cJ;langes would be written 

into the Sub~Comm1ttee 4 report and d1atr1but1on would be made 

at an early dateo 

CAPTAIN HARPER asked 1f this report should be forwarded to 

the Plenary Committee at once9 or held untjl the submission o.f 

the .final report from Sub-Committee A. 

CAPTAIN SAFF<ED said that he would prefer to have it forwarded 

without delay~ 

All members agreed c 

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3 

;_ 
. . ef ()iE-~~~ e 

CAPl'AIN SAFFORD departed from the meetingo 

MR. FRI.EDMAN asked 1f anyone wished to exam1r.e the retyped version 9t ti:.e r·eport just consj.dered, before 1 t ·was forwarded 

to the Plenary Comn1ttee. 

No one desired· a re 0 exam1nation, and MR. FRIEDMAN assured . the m~bers that every· precaution would be taken to insure that 

the changes were correctly made. He added that copies would be 

d1str1buted to all Committee·membera. 

ITEM 5 ~ PLANNING FOR WORK Ot SUB-COMMITTEE B .·. ' 

MR." FRIED.MAN asked Dr. S:tnkov 11' he wished to comment on 

plans ror Sub-Committee B. 

· . DR. SnntOV replied that no cencrete plane bad been nade, ln 

ant1c1pat1on of receiving seneral lnstruct~ons from the Combined 

Ex.eout1ve Committee. 

MR. FRIEDMAN asked Captain, the Earl Cairns it he had any particular desires ·with regard to the work or· Sub-Committee ~· 

CAP'l'AIN, THE EA~L CAIRNS suggested the possib111ty ot having both morning and afternoon meetings. ' ' 

MRo FRIEDMAN asked if this plan would be satisfactory w1th 

the u. s. members ot Sub-Committee B who were pursuing their 

normal du ti es o 

DR. SINKOV replied that 1t would depend largely upon hour 

long the Sub-Comm1t tee continued to. rune tiono "-

COLONEL COLLINS suggested that ~o meeting& be held on Saturda1 

morning ~nless absolutely necessar7. · 

DR. SINKOV proposed that t~e Sub-Committee meet every afternoon and two mornings per week~ 

CAPTAIN, THE EARL CAIRNS agreed with this proposalo. 

The members agreed to schedule the t1rst three meetings tor 

Wednesda1 afternoon, Thursda1 morning and Thursday afternoon-~ 

add1t1onal meetings to be scheduled as a neeQ for them was 

determined. 

DR. SINKOV asked it Sub-Committee B should meet with the 

worldng groups concerned or meet as a Sub-Committee above and 

call in members of the working g:roupa as necessary.,, 

CAPTAIN HARPUt a·a1d that it was contemplated that there would 

be simultaneoue meetings ot the working groupao . He said that it 

such was not practicable 1t would be best to call the members 1n 

on an individual basis!>··· · 

TOP SECRET 

4 
•••• 

4. ' ·' • e ---fflEfF -~€~r • 

DR. SINKOV said that this procedure seemed best to him. He, 

said he could have the American members of ~he working groups·· cstt 

call and available whenever they were neededo 

MRo FRIEDMAN asked which item sho~l~ be considered f1:rost. 

DR. SINKOV said that the u. s. representati.,es were prepared 

to discuss the subject tar Wo~k1ng Group Noo 2o 

CAPrAIN, THE EARL cAmNs aak~d 1r were intended that the items 

would be considered in order of their listing. 

MR. FRIEDMAN suggested that 1 tema "a·" and "b" be consolidated. 

·cAPrAIN, THE EARL CAIRNS remarked that mu·ch work had been done 

on Item nan and SUF,gested that the two items be kept separate. 

This suggestion was agreed to b7 all members. 

DR. SI?iKOV th,~ su~gested that each item first be discussed 

generall7 on a b~oacl basis, followed by a presentation of the 

u. So and British views on the subjeoto 

CAPTAIN HARPER asked that Sub-Committee B meet as soon as 

practicable to inspect a model of a small device, which 1t was 

necessarJ' to .1•eturn to the contr•ctor at an earl1 date tor 

further development work. · 

Irro COLONEL HENN-C.OLLINS commented that bis group bad some 

devices which ·the1 wished to send back to England aa soon aa 

possible tor the saine reaaono It was agreed that the Sub-C011'1D1ttee 

would meet at 1000, Thurada7, 28 Septembe:r 1950. 

MR. FRIEDMAN stated that the t1me ot the next meeting of the 

Combined ~xecut1ve Committee was unc~rta1no He said thaf he 

would be awa7 on Thursday and Friday but would return Monda70 

He would be willing to try-to call a meeting on Monday aftar_noon, 

he said, it there was suff'1c1ent business for the Comnittee ·to 

consider. I ; 

It was agreed that the next meeting of the Combined Executive 

Committee would be held at the cal~ of the Cha1rman9 

The meeting adjourned at 10550 

. . 

·roP SECRET 

6 
• 

29 September 1950 

MEMORANDUM FOR THE MEMBERS OF THE EXECUTIVE COMMITTJ!!E: 

Subject: Tentative Minutes of the Second Meetingo 

lo The subject .minutes are forwarded herewith 

for your consideration,,. 

2a Please advise the Secretariats loc.ated in 

Room 19-211, Uo So Navy Security Station, (Telephone: Code 155~ extension 353 or 354) of your comments and/or 

concu.rrenceo 

w.~ Jo W o PEARSON 

Secretariat 

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1 
• 

• e REF ID:A67i~~ e 

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BRITISH GO UNITED STATES' corvtJfUNICATIONS SECURITY ·coNF.1£EENCE 

MINU'l1ES OF ·.· 

THE ·sEC OND MEETING OF -TH"E EXEC~UT IVE C OM:MITTEE 

The Second Meeting of the Executive Committee of the 

British ~ United S.tates Communications Security Conference 

was held at 1000 on 27 September 1950 in Room 17-318, 

Uo s. Navy Security Station, Washington, Do Co 

Representatives Present· 

Uni tcd States United Kingdom 

Mr. w. F. Frie.dman, ~ b!n~Cha1rman Colonel S. P. Collins, US~ 

Captain, the Earl Cairns, R.No 

Lt. C·olonel Co A. Henn-Collins 

Commander J.R.G. Trechman, R.N. 

Brigadier John T. Tiltman Captain L~· F. Safford, USN 

Captain J. s. Harper, USN 

Colonel R. c. Sears, USAF 

Lt. Colonel R. H. Horton, USA 

Lt. Colonel .Go V. Johnson, USA 

Dr. A. Sinkov 

Secretariat 

Lieutenant J. W. Pearson, U.S.N. 

Mr. Ho Do Jones · Miss Catherine M. Johnson 

TOP SECRET 

----~---- - - --· -
• 

ITEM 1. CHAIRMANSHIP OF COMBINED EXECUTIVE COMMITTEE 

MR. FRIEDMAN' stated, for the record, that the Chairmanship for this particula.r meeting had been changed 11 by agreement, from 

Mr. ivfiller to himse-l.f'. 

ITEMS 2 AND~ - Bf;ITISH AND U. S. COMMENTS 

MR. FRIEDMAN commented that the draft agenda which he had 

prepared was· by no means all-inclusive, but would serve aa a 

basis for d1scuss1on. He·1nv1ted the members to bring.up an1 

additional matters which they wished to have considered. He 

·then asked 1r any members of the Br1 tiah delegation wished to 

comment upon general progress dt the Conference to date. 

CAPTAIN, THE EARL CAIRNS expressed his opinion that things 

were going well indeed o ·ae said that the completion of the 

Sub-Committee A assignment had taken rather longer than some 

had hoped; however, he thought the Sub-Committee had done a 

good job. He added that he would have additional comments 

when Item 5 of the Sub-Committee B assignment was consj.dered a 

MR. FRIEDMAN said that he thougl1i Sub-Cormnittee A was to 

be congratulated for having completed its work in such an 

exped1 t1oua manner. He refer·red to the minutes or the first 

meeting of the 8xecut1ve Committee, stating that he h~d hoped 

to have them available for consideration at this meeting. He 

assured the members that copies would be distributed momentarily, and any proposed changes could be submitted at the.next 

meeting. 

ITEM ·4. CONSIDERATION OF f.EPQI·,T OF SUB-COMMITTEE A 

With regard to the processing of final Conference papers MR. FRIEDMAN explained that the recommendations of the 

Conference would be subject to approval by Qigher authori:ty 

on the u. s. side, in that it would be necessary to subm~~t 

them to the U. s. Joint Chiefs of Staff via the Armed Forces 

Sec ur1t1 Agency C ounc 11 •. He commen t.ed that this would take 

time but he thought it could be accomplished within one montho 

COLONEL COLLINS agreed with this estimate, adding his 

presumption that the entire Contorence report would be forQ 

.warded at one time. 

CAPI'AIN, THE EARL CAmNS commented upon the large amount 

of work to be done by. l January 1955,, and .said that the sooner 

a firm agreement could be reached the bettero 

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the 

the 

the 

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COL:>NEL coils said that ft might be possible to tmv.,1ard Conre~ence recommendations 1n·two separate parts, letting Sub-Comnittee A recommendations be submitted in advance of 

remainder o.r the Conference report .• 

CAPTAIN SAFFORD explained that the U. S. Joint Chiefs of 

Scaf.t' had already approved and su~mitted to the British the 

proposal tor transfer of t.he 7-Rotor .BCM. He said that upon 

Br! t1ah approval dl'tbe broad propos·a1, 1 t ·would be necessary 

to obtain additional approval onlJ on minor detai~1. 

MR. FRIED.MAM suggested that 1t might be well, then, to 

.forward the Conference report in.two separate parts. 

COLONEL COLLI~S agr·eed, expla1n1ng that the two s~parate 

matters had been combined only to~ convenienceo. 

All members appeared to i·avor this procedureC! 

MR. FRIEDMAN then stated ·that, unless there was objection, it would be. agreed that the report ot Sub-Commi_ttee A would be 

handled as a·a~parate matter and would be sent forward tor 

approval immediately after the Combined Plenary Committee has 

reached final agreement 1d. th :respect to it o 

'!'here was no objec·tion to this deciaiono 

MR. FRIEDMAN invited the members' attention to the report submitted by Sub-Committee A. Be suggested that each member 

stud1 it brletl7 before proceeding w1 th a detailed consideration 

ot it. 

After a brief study the members considered the report in 

its. ent1ret7. As a result of this consideration it was agreed that the following changes would be made in the ·report as sub~ 

m1tted b7 Sub~Comnittee A (Cormnents are included where 

appropriate): 

l. Title: Change to read: "FlJ;'St Feport of Su.b-Conmittee A"o 

2a Paragraph 7, Line 3 - delete "Agreements", insert 

"recommend a tlons". (Comment: I.t waa.. agreed that the 

Sub-Committee could only recommendo Agreement will 

be sought trom higher authorit7.) 

3. P:n·agraph 7b - Change to read as follows: "Except by mutual agreement, disclosure of the 7-notor BCM 

principle wi.11 be limited to the Uo S., and to the 

British Commonwealth. ~·he Bri t1sh agree to not!t7 

the u. s. authorities when any issue ot a combined 

7 ... rotor BCM system 1s made to a na t1on of the 

British Commonwealth." · 

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++-~-~ . ..._!il!-fi_ ._~_ -~£7l63 ·

9 

4o Puragraph 7e(7} ° Change to read as follows: "And 

similar technical matters." 

5. Parar,raph 7e, final 3 sent~nces - Change to read as 

follows: "Upon completion of these studies the 

Uo s. and the u. K. will exchange technical papers 

through established channelso If necessar1, a 

special meet1ne to.reconcile ~ivergent views m~y 

be held _in London (or Washington) at· some later 

date." 

So Parag~aph 7t,, Line 2 -. Cha,nge "Purposes" to "Purp&ae" o 

7 o Paragraph 7t, Line 2 - Change "Agreement" to "Agreements"" 

8. Par·agraph 7gt1 Line 3 .. Delete ••ca ven", insert "3lade 

available o (Comment: Change required for conformance to exist1ns law&-) 

9 •. Paragraph 7h ... Change to read as follows: "Make 

av·a1lable to the Bri t1sh the tools and dies for · MARX I rotors (tor old TYPEX adapter)-.. " 

10. Paragraph 71 - Change to read as follows: ".Make 

available to the British the tools and drawings 

or. old TYPEX adapter, new design of TYPEX adapter 

rotors with tires, and parts and drawings for new 

'l'YPEX adapter • " 

llo Paragraph 8 - Change opening sentence to read as follows: 

"The following recommendations were agreed upon 

regarding 1mprove~ent of securit7 ot present CCM 

until supersess1on dat..-·' .. 1 Januar;, 1955 as proposed 

by the Uo So JCS in 2074/2 dated 27 December 1949 .. 11 

12.. Paragraph Sc "'!' Change to read as follows: "Matters 

such as the rate of supersession and specific times 

of suporsession are to be left to the ostablished 

agencies charg~d with.such matters~" 

MRo FRIEDMAN stated that the above cbanges would be written 

into the Sub~Comm1ttee A report and distribution would be made 

at an early dateo 

CAP!'~IN HARPER asked jf this report should be forwarded to 

the Plenary Committee at once, or held untjl the submission of 

the final report from Sub-Committee Ao 

CAPTAIN SAFFCRD said that he would prefer to have it forwarded 

without delay~ 

All members agreedQ 

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_CAPTAIN SAFFORD departed from the meet1ngo 

. MR. FRIEDMAN asked 1r an7one wished to examine the ret7ped 

version ~f the report just consldered,. before 1 t was forwarded 

to the Plenar1 Comn1ttee • 

. Nb one desired· a re.;·exam1natJon, and MR. FRIEDMAN assured 

the members that every precaution would be taken to insure that 

the.changes were correotl1 made. He added that copies would be 

distributed to all Committee· members. 

ITEK 5 .. PLANNING FOR WORK OF SUB..-COUITTBE B 

MR. FRI.EDMAN asked Dr. S1nkov 1f he '11!1ahed to comment on 

plans for Sub-Comm1tt$e B. : . . 

.DR. SINKOV replied that_,no concrete plans bad been nade,.1n 

arit1cipat1on of receiving general 1nstruot3ona trom the Combined 

Executive Committee~ 

MR. FRIEDMAN asked Captain, the Earl Cairns it he had an7 

particular deai res w1 th regard to the work of Sub•Commi ttee B .. 

CAPTAIN, THE EARL CAIRNS suggested the poss1b111t7 of having both morfting and afternoon meetings.. · · · 

MRo FRIEDMAN as~ed if th1a plan w_ould be satisfactory w1th 

the U. s. members ot Sub-Committee B who were pursuing their 

normal du t1 es o 

DR. SIMKOV replied that 1t would depend largel7 upon hew 

long the Sub-C0111Dl1ttee continued to functiona 

COLONEL COLLINS suggested that ~o meet!ng1 be held on Saturday morning unless absolute~7 necessar7. · 

DR. SINKOV proposed that t~e Sub-Committee meet every after" 

noon and two mornings per week. . 

CAPrAIN, THE EARL CAIRNS agreed with this proposal. 

The members agreed to schedule the first three meetings for 

Wednesda7·atternoon, Thursda7 morning and Thursda1 afternoon-~ 

additional meetings to be scheduled as a need for them waa 

determined., 

DR. SINKOV asked if Sub-Committee B should meet with the 

worldng groups concerned or meet as a Sub-CQmmittee above and 

call in members ot the working groups as necessary-'? 

CAPTAIN HARPJ!fi said that 1t was contemplated that there would 

be aimultaneou• meetings ot the working groups •. He said that if' 

such was .not practicable 1 t would be best to call the members 1n 

on an 1nd1"t1dual basis.··. 

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DR. SI~'KOV said that this procedure ·seemed best to him. Ho 

said he could have the American members or ~bet working grout's· dh 

call and available whenever th&J were neededo 

MR o FRIEDMAN as.ked which 1 tem sho"ld be considered first. , 

DR. SINKOV said that the u. s. representatives were pttepared 

to discuss.the subject for Working Group Noo 2. 

CAPl'AIN~· THE .EARL CAIRNS asked 1f were intended that the items 

would be considered in order of their listing • 

.MR o FRIED.MAN suggested that 1 tema "a" and "b" be conaol1datado 

CAPl'AIN, THE EARL CAIRNS remarked that much work had been done 

on Item nan and su.rsested that the two 1 tams be kept separateo 

Th18 auggest!on was agreed to by all memberso 

DRo SINKOV then su~gested that each item fJrat be discussed 

generallJ on a bt•oad bae1a, followed by a presentation of the 

u. s. and Bri t1ah views on the subjecto 

CAPTAIN HARPER asked that Sub-C.omm1ttee B meet as soon as 

practicable to inspect a model ot a small device, which it was 

necessarJ' to i•eturn to the contracter at an early date for 

further development worko 

Ill'o COLONEL HEB-COLLINS commented that his group had some 

devices which· the1 wished to s~nd back to England as s.oon as 

possible for the same reason. It w$a agreed·that the Sub-Committee 

would meet at iooo·. Thursday, 28 September 1950. 

MRo FRIEDMAN stated that the time ot the next meeting of the 

Combined lixecut1ve Coinm1ttee was uncertain. He ~aid tha~ he 

would be away on Thursday and Friday but would return Monda7. 

He would be willing to tr7 to call a meeting on Monda7 after.n.oon, 

he said, it there was sufficient business for the Conm1 ttee 'to 

consider. I ." 

It was agreed that the next meeting of the Combined Executive 

Committee would be held at the call of.the Chairman~ 

The meeting adjourned at 1055. 

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SESRE'l SECRET • 

BRUSA C<JJJ:SEC CONFERENCE 

Combined Executive Committee - Meeting on 27 September 1950 

AGENDA 

-== 

l~ Chairmanship ot Combined Executive 

Committeeo · 

2o Comments by British Miasiono _ .. __ r,/U. ~\en L 

/~l~ lc....rt \ti k pJ~· --\ )~ Comments by Uo So .Mi~siono '-~ · 

4o Consideration ot Report ot Subcommittee Ao 

5o Planning tor work of Subcommitte~ Bo 

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MRo MILLER inquired as to the a2:'rangemente f'or recording 

the proceedings or the Conference~ 

MRo FRIEDi.uN replied that the Secretariat would .publish the min~tes of the Plenary and Executive Committee Meetings in 

sumμW.ry form~ but that verbatim minutes would not be taken9 

subject to the wishes of the British Delegation.. lie pointed 

out thati; in tim~ recorders would be appointed for the Working 

Groups and the Sub .... Committess.. Turning to a new eubJeot 9 he 

stated that oftice space had been provided for the British . Delegation.it and also spaces f'or the w·orking Groups"· With re ... gard to the meetings. for the Sub°Comm.1ttees 9 Mr~ Friedman sug- . gested that they be held daily 1n the afternoons starting on 

:.M:ondB.1 9 25 September 1950 9 at one t~1rt.v or two·ovclock~ ex-

.plaining that the Uo s~ Representatives were prepared to stay 

as long as necessary for the completion of business each 

afternoono 

MRo MILLER replied that one thirty o'olook was suitable 

to himo 

MRa FRIEDMAN observed that it would be advantageous to 

keep the M~et1ngs as small as is consistent with good worka* 

bility0 however 0 he emphasized that in event any Group or 

Committee Chairman deemed it desirable to call in technical 

assistance 9 he sbonld feel free to do soo Turning to Mra 

Miller 9 ~nd making reference to the background statement$ 

that he had read at the First Meeting of the Plenary Com~ 

mitteell :Mra Friedman inquired if the British Delegation had 

any objections or comments to make particularly with regard 

to the articles quoted from the agreernentso · · 

MRo MILLER repl·ied that his Delegation had no comments 

on the articles quoted from the agreements 8 but that they would 

like to make certain that they understood themo 

. MRo FRIEDiJIA.N stated that he would make a copy available 

to the British Delegation fo~ their stud~o 

r.mo MILLER recalled that a meeting of 3Ub=Co.mmittee A 

.had been set for 0930 P'riday morning11 22 September 1950 9 and 

inquired whether there would be a meeting in the afternoono . . 

CAPTAIN SAFFORD replied that the question of whether a 

meeting would be -~eld in the afternoon would depend upon the 

proBress of the morning meet1ng8 and the wishes of the British 

Delegationo ~e emphasized that the Uo So Authorities did lWt 

wish to appear hasty in the premises 9 e.nd invited the British 

to take as much time as they neededo · 

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BRITISH - UNITED STATES COMMUNICATIONS SECURITY CONFERENCE 

MINUTES OF· 

TBE FIRST MEETING OF 1!1E· EXECUTIVE COMMITTEE 

The First Meeting of .the Executive Committee-.-Q.t the Bri- . tfsh - United States Communications Securlty Co~erence was · . ·held at 1500 on 21 September 19.50 in Room 1212.il. U.·. So Navy Qommunica.tion Station9 washington11 D. Co · ·· ·. . · 

· R~,e_resentatives Present 

United· States . > United Kingdom . 

1 

Mro Wo .. Fo Friedman . Colonel So Po Collins; USA 

Captain Lo F o · Sattord9 USN C~ptain ;ro Sa Harper&· USN 

Colonel Ro Ca Sears» USAF 

Captain H. 0 D. Hanseri. 11 USN 

Lta Cola Ro Ho Horton9 USA 

J;>r o Ao Sinkov 

Mro·T.,Ro\Vo Burton.Millerp Chai"rman 

Captain3 the Earl Cairns, RaNo 

-, 

Mr~ Kenneth Pe~r,in · · '' ' 

Mro J .M.Go Pollard · · Lt~ Coln Ca Ao llenn~Collins 

l!ro Ea Ho Jolley Brigadier tT o Ito Til tman 

Group Captain Benjamin Balli) ·R.AoF a 

Commander tr .R .. G·c. Trechmang RaN. · 

Secretariat 

Lieutenant J. ·~yo Pears.o.n 9 U oSaNo 

Mro H. Do Jones 

Miss Catherine f./l." Johnson 

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MR c 1AILUR stated that ha \i-as most anxious to get- along with t.be proceedings& ar-d inquired if it would expedite Wld 

simplify matters if he stated at this time ~hat the Brlt~sh 

views were favorable ~o t~e acceptance or the seven rotor 

m.achine :f:'or combii1ed use; he obse£'\ted that. he 1'Jasn't sure 

wnat.b.er this tlJ'Ollld limit 111 any way the a:t10unt ot demonstra~ 

t1on necessarya 

CAPT.AIN &Ui'FORD replied that such information might slmplii'y and strerunlin.e the whole procedure, adding that pQs~il;>ly 

the raatter of 1.idopting the seveJJ. -rotor machine for cotnbined 

use could be settled on F~id.al', September 22ndD 

CAPTAIN HARPER said that to finish the matter in one dey was~ in his estimation, a very optimistic o~tlooko 

Captain, the Earl CAIRNS observe~ tha~ he thought the 

matter of replacesnent of the CCM ~ight take three dayso 

COLONEL COLLINS pointed out that discussions of the rotor 

problems would probably result in complications which mi8ht 

take more time to resolve than had been an~icipatedQ 

On the other hand8 f•ffio FRIEDMAN remarked t.tiat if Captain 

Safford• s optimism Nere well :rounded» and the CCJJI bu.siness 

;inished on F~idny, the~ Sub-Committee B could meet on Saturday morningo He sug&estecf ~nat for the sake of the record it might 

be ?rell if .Mra Miller could designate the B1•itish membership on 

Sub-Committee A at this tlm.eo 

~tRa illLLER replied that he would like the whole visiting British Delegation9 and in addition Brigadier Tilt.man from ti~e 

to time, accreeited as members or S~b~Cornmittee AQ 

OOI-1.JANDER 'l'RECHMAt~ remarked thaL he a .ad Grpup Captain Ball wer~ interested only if matters relative to the North 

Atlantic Treaty Organization were to be discussedo 

CAPTAIN SAFFORD e:plulnad that he did not anticipa~e any such discussions since the Uo So representatives were not a~thorized to consider North Atlantic Treaty-Qrganization 

matters. 

~KRo FRIEDM.L\N aom.m.e.utecl that Sub-Cotumi tt.ee B members could 

be designated at a later date, but it was his unJers~andi.ng that 

Mro Miller desired the whole of -1,he visitifi6 delegation accredited to the Plenary and the ~xecutive Oommitteeso 

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MRo ·Ml-LLER replied in ·the affirmative; he stated that ·ha 

understood the fun.otion of' the Executive Committee was to hear 

the findings of the Sub .... commi tte~s.6 

MR •. FRIEDMAN replied ·that such was correct,· and that the 

Executive· Committee would report.· to the Plenary Committeeo. 

URo MILLER stated that he then could reduce the· membership 

on the Executive Committee con,s14erably9 that the British repre ... sentation on that Committee would consist of himself and Captain, 

the Ear 1 Cairns o · · 

MR11 FRIEDJJCAN suggested that Mro !llill~r might name the 

Chairman of' Sub...Committee a· at this tim~ if' he so desired, 

pointing oat that Admiral Stone desire.d Captain Safford to be 

the Chairman of' Sub ..... Committee A. · · 

MRo MILLER replied that he himseit would chairman SubQ 

Committee Bo 

MRo FRIED.MAN inqu_ired whether Mro Mi;Ller desired secrec0t 

tarial assistance f'or his of'f'ice_q 

MRa MILLER replied in the negative 9 stating that most of . the re·cording would be taken care of at. the meetings.o.-

MRo FRIEDMAN inq.uired of· Mro Miller as to. when he expected 

his exhibits and drawings to arrive" 

. MRo l4ILLER replied that the next sailing of -the ~ueen Marz 

was .scheduled for September 21st,. arriving in Ne1.v York in about 

five days; and - allowlng two days for the material to reach 

Washington 9 it should arri~e.on or about September 26tho 

COLONEL COLLINS suggested to· llro Miller that when he ·was 

ready to call a mee'ti.ng of .Sub-Committee B that he consult Drq 

Sinkov who headed. the U 4 So .·representati:ves on the Committeec1. 

· MRo FRIEDMAN-- "inquired if there were any items ·the British . Deleg~tio.n wished to· add. at this time·o· · . 

MR a MILLER replied that he would like def'ini"tions .of two 

or three of the itemso 

COLONEL COLLINS remarked that most of the pres~nt agenda 

was DJ.'rely an amplificat.ion ·or the agenda that Mro. 'ft!iller had received~. · · 

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MRo FRIEDMAN explained that the agenda that Mr~ Miller had 

received didnvt contain the CCM item and stated that the other 

change consisted of the shifting of what is now Item.2e from its 

previous position of. 2ao 

Referring to item IoAolo of the Enclosure to the Agenda 9 

!mo MILLER inquired as to whether a machine or function was 

meanto He said that he would like to have some idea as to the 

significance of the various categorioso 

MRo FRIEDMAN replied that a function was meant with regards 

to the item in ques.tiono . . MRo MILLER then inquired as to how item IoBo2o differed 

from item IoAolo 

DRo SINK.UV replied that IoAol., was a general statement cf 

purpose 9 while functional requirements in IoBa2o meant how the 

equipment would actually function~ 

· MRo MILLER requested a clarification and distinction 

between items IoCo2o and I.Do 

CAP.TAIN SAFFORD replied that. the di~tinction lay between 

the machine on the one hand 9 and the operator of ·the machine 

on the othero 

Making reference to item 2oao of the agenda 9 imo MILLER 

inquired whether "telegraphic'' was i~cluded to distinguish from "telepho.nic "o 

. CAPTAIN SAFFORD replied that the word ''telegraphic" was 

intended to mean = within the scope of Morse code telegrapha 

MRo FRIEDMAN remarked that Ua So Authorities had considered combining items 2oao and 2o bo irito one ':.'/orking Group 9 due to the fact that they were closely relatedo 

. DRn SINKOV explained that the reason for the. separation of the two was that the Merchant Ship Problem had been con= 

sidered ."important ·enough in itself _to. be considered separatelyo .. 

MRo MILLER agreed that it miBht be confusi.ng if both were 

considered together.a 

Uaki.ng reference to Enclosure A to the Agenda 11 item III A. 9 Description or Model Demonstration 9 l.IIR. MILLER stated that this 

was one case in which they would be limited to descriptions only9 but that his ~elegatio.n would be bBPP.Y' to describe th~ various 

undertakings presently in progress at home • . : 

.;., 4.:. 

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·MR o MILLER inquired of' Mrb Friedman as to how long in 

advance or meeting dates he woul.d like ·pertinent p~pers circulated - he asked if 48 hours in advance would be satisfactor.ro 

MR@ FRIEDMAN replied that 48 hours in advance would. be .satisf'actory~ · · 

MRQ MlLLJ:R inquired if there were an, other items to ·come 

before the Committee.a· . · ·· 

There were noneo 

The meeting adJou~ned at 15330 

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REF ID:A67163 

' 

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Z1 September 1950 

Subject~ Tentative l:inutes of the First lleetingo 

lo ihe subject minutes are fornal'ded herew:i. th for '7t1a1f 

ccnsideratiODo 

2. Please advise the Secretariat, 1oc&ted in Room 211, 

Duild:ing 19, U • So Uav Security' Statt.cn, telephone extension 

354, of your comments and/or concurrence. 

~~ J • l1 o PEARSCJ:l 

Ho D. Jams 

Secretariat 

•.:. 

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01 
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BRITISH = UNITED STATES COMMUNICATIONS SECURITY CONFERENCE 

MINUTES OF 

THE FIRST MEETING OF THE EXECUTIVE COMMITTEE 

The· First Meeting of .the Exec11tive Committee o.t the British - United States Communications Security Conference was 

held at 1500 on 21 September 1950 in Room 12129 Uo So Navy Communication Station» Wash1ngton9 Do Co 

Representatives Present 

United States 

Mr~ Wo Fo Friedman 

Colonel So Po Collins 9 USA 

Captain Lo Fo Safford9 USN 

Captain Jo So Harper 9. USN 

Colonel Ro Co Sears 9 ~SAF 

Captain Ho Oo Hansen9 USN 

Lto Colo Ro Ho Horton8 USA 

:Oro Ao Sinkov 

United Kingdom 

Mro ToRoWo Burton Miller 9 Chairman 

Captain9 the Earl Cairns 9 RoNo Mr~ Kenneth Perrin 

Mro J.MoGo Pollard 

Lto Coln Cc Aa Henn-Collins 

1lro Eo Ho Jolley Brigadier J' o IIo Til tman 

Group Captain Benjar.iin Ball 9 RoAoFo 

Commander J.RoGo Trecbman 9 RcNo 

Secretariat 

Lieutenant Jo ;'{r,. Pearso.n11 U aSoN o 

Mro H .. Do Jones 

P.Uss Catherine Mn Johnson 

TOP SECRE·r 
REF ID:A67163 • ... 

TOP .SECRET MR~ MILLER inquired as to the arrangements for recording 

the proceedings of the Conference~ 

MRo FRIEDMAN replied that the Secretariat would publish the minutes of the Plenary and Executive Committee Meetings in 

summary form9 but that verbatim minutes would not be taken11 

subject to the wishes of the British Delegutiono Ile pointed 

out thats in tim~ re-corders would be appointed for the ~·1orking 

Groups and. the Sub=Committees('I Turning to a new subject 11 he 

stated that office space had been provided tor the British 

Delegation11 and also spaces for the Working Group~ 11 with re= 

gard to the meetings for the Sub-Comm.ittees 11 Mro Friedman sug= 

gested that they be held daily in the afternoons starting on 

Monday 9 25 September 1950 11 at one thirty or two ovc1ock 11 ex= 

plaining that the Uo So Representatives were prepared to stay 

as long as necessary for the completion of business each 

afternoono 

~mo MILLER replied that one thirty o'clock was suitable 

to himo 

MRo FRIEDMAN observed that it would be advantageous to 

keep the Meetings as small ·as is consistent with good worka= 

bilit111 however 9 he emphasized that in event any Group or 

Committee Chairman deemed it desirable to call in technical 

assistance 9 .he should feel free to do soo Turning to Mro 

Miller 9 and making reference to the background statement$ 

that he had read at the First Meeting of the Plenary Com~ 

mittee 9 Mro Friedman inquired if the British Delegation had 

any objections or comments to make ·particularly. with regard 

to the articles quoted from the agreernentsQ -

MRo MILLER replied that his Delegation had no comments 

on the articles quoted from the agreements 9 but t~at they would 

like to make certain that they understood themo 

MRo FRIEDlM.N stated that he would make a copy available 

to the British Delegation for their studya 

MRo MILLER recalled that a meeting of Sub=Committee A 

had been set for 0930 Friday morn1ng 9 22 September 1950 9 and 

inquired whether there would be a meeting in the afternoono 

CAPTAIN SAFFORD replied that the question of whether a 

meeting would be .held in the afternoon would depend upon the 

prosress of the morning meeting!> and the wishes of the British 

Delegationa He emphasized that the Uo So Authorities did not 

wish to appear hasty in the premises 11 and invited the British 

to take as much time as they neededo 

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MR., MILLER stated that he was most e..nxious to get along with the proceed1ngs 9 and inquired if it v1011ld expedite and 

simpli1'y matters if he stated at this time that the British 

views were favorable to the acceptance of ·t;he seven rotor 

machine for combined use; he observed that he· wasn't sure 

whether thls would limit in any way the amount of demonstra= 

t1o.a nee essary o 

CAPTAIN SAFFORD replied that such information might sim= 

plify and streamline ·the whole prooedure" adding that possibly the matter of adopting the seven rotor machine for combined 

use could be settled on Friday, September 22ndo 

CAPTAIN HJ\RFER said that to finish tl1e matter in one day 

wus 9 in his estimation!) a very optimistic outlook<) 

Captain9 the Earl CAIRNS observed that he thought the 

matter of replacement of the CCM might take three dayso 

COLONEL COLLINS pointed out that discussions of the rotor 

problems would probably result in complications which might · take more time to resolve than had.been anticipatedo 

On the other hand 9 MRo FRIEDtJIAN re.marked that if Captain Safford 9 s optimism werewel.l founded,. and the CCM business 

finished on Friday 9 then Sub-Committee B could meet on Saturday morningo He suggested· that for the sake of the record it might be well if Mro Miller could designat~ the British membership on Sub~Committee A at this timeo 

MRo MILLER replied that he would like the whole visiting British Delegat1on 9 and in addition~Brigadier Tiltman from time 

to time)) accredited a~ mernbers of Sub=Committee Ao 

COMMANDER TRECHMA.N remarked that he ·and Group Captain Ball were interested only if matters relative to the North 

Atlantic Treaty Organization were to be discussedo 

CAPTAIN SAFFORD explained that he did not anticipate any such discussions since the Uo So representatives were not· 

authorized to consider North Atlantic Treaty Organization 

matterso 

MRu FRIEDMAN commented that Sub=Co.mmittee B members could 

be designated at a later date 9 but it was his understanding that 

Mro _Miller desired the whole of the visiting delegation ac= 

credited to the Plenary and the ;~xecutive Co.mmitteef[lo 

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MRo MILLER replied in the affirmative; he stated that he 

understood the function of the ~xecutive Committee was to hear 

the findings of the Sub-Comm!tteeso 

· MRo FRIED!.4A.N replied thut such was oorrect 9 and that the 

Executive Committee would report to the Plenary Committee~. 

?!Ro MILLER stated that he then could reduce the membership 

on the Executive Committee considerebly9 that the British repre- sentation on that Committee would consist of himself and Captain0 

the ~arl Cairns~ 

MR., FRIEDMAN suggested that Mro Miller might name the 

Chairman of Sub-Committee B at this time if he so desired 9 pointing out that Admiral Stone desired Captain Safford to be 

the Chairman of Sub-Committee A. 

MRa MILLER replied that he himself would chairman SUb= 

Committee Bo 

MRa FRIED.MAN inquired whether M.ro Miller desired secre= 

tarial assistance for his otticea 

MRo ~LLER replied in the negative~ stating that most or 

the recording would be taken care of at t·he meetings .. 

MRo FRIEDMAN inquired of Mra Miller as to when he expected his exhibits and drawings to arriveo · 

· MRo MILLER replied that the next sailing of the ~ueen Mary 

was scheduled for September 2lst 9 arriving in Ne1v Yor in abou-t 

five days; and - allowing two days for the materiul to reach 

Wash1ngton8 it should arrive on or about September 28tho 

COLONEL COLLINS suggested to lAra Miller that whe.n he was 

ready to call a meeting ot Sub-Committee B that he consult Dro 

Sinkov who headed the Uo Sn representatives on the Committeea· 

MRo FRIEDP-!AN inquired if there were any items tha British 

Delegation,wished to add at this timeo· 

MRo MILLER replied that he would like definitions of two 

or three of the itemso 

COLONEL COLLINS remarked that most of the present agenda 

was merely an amplification of the agenda that Urn ~iller had 

received"' 

... .3 .... 

TOP SECRET 
·• . . e REF ID:A67163. 

i-9 1:J S·EEnrT 1 I - f'._T 

MRo FRIEDMAN explained that the agenda that Mr~ Miller had 

received didnwt contain the CCM item and stated that the other 

change consistei of the shltting of what is now Item 2e from its 

previous position ot 2aa 

Referring to item loAolo of the Enclos~re to the Agenda 9 

MRo MILLER inquired as to whether a mHchine or function was 

meanta He said that he would like to have some idea as to the 

significance of the various categorioso 

MRo FRIEDMAN replied.that a function was meant with regards 

to the item in question~ 

r.m" MILLER then inq ui. red as to how 1 tern I .. Bo 2 o differed 

from item I..,A,,lo 

DB.a SINKOV rep.lied that IoAol., was a general statement of 

purpose 9 while functional requirements in IaBa2o meant how the 

equipment would actually function~ 

MRo MILLER requested a clarification and distinction 

between items laCo2o and loDo 

CAPTAIN SAFFORD replied that the distinction lay between 

the machine on the one hand~ and the operator of ·the machine 

on the other., 

Maklng refere.ace to item 2oa,, of the agenda. 9 .MRo MILLER 

inquired whether "telegraphic'' was included to distinguish from "telephonic"~ 

. CAPTAIN SAFFORD replied that the v1ord ''telegraphic" was 

intended to mean = within the scope of Morse code telegrapho 

MRo FRIEDMAN remai-ked that Uo So Authorities had considered combining items 2oao a.a.d 2ob,, into one ~-1orking Group1> 

due to the fact that they were closely related<, 

DRn SINKOV explained thn.t the reason for the separation of.the two was that the Merchant Ship Problem had been con= 

sidered· important enough in itself to be considered separatelyo 

~.mo MILLER agreed that it might be confusing if both were 

considered togethera 

Uaking reference to Enclosure A to the Agendaii item III· Aa 9 Desoriptj.on or. Model Demonst:ratlon 11 MRo ·MILLER stated that this 

was one case in which they would be limited to descriptions only9 but that his 1elegation would be happy to describe the various 

undertaki.ngs presently in progress at homeo · 

.;,. 4 ... 

TOP SECRET 
· ... • REF ID:A67163 

TOI' SECRET • · Mao MILLER inquired ot .MrQ Friedman as to how long in 

advance of meeting dates he would like pertinent papers circulated - he asked it 48 hours in advance would be satistactoryo 

MRo FRIEDMAN replied that 48 hours in advance would be 

satist"actoryo 

.MR<I MILLER inquired l:f there were any other items to come 

before the Committeeo 

There were nonea 

The meeting adjourned at 15330 

.... 5 ... 

TOP SECRET 
• REF ID:A67~ 

SECRET .., 

COllSEC COSEBEHCB 

Working Group Noo l 

17 October i9;0 

689HB! 

Chairman's Memorandum lfo" 6 

Working Group No. 1 met with combined subcommittee B 

on 17 Octobero The proceedings of the meeting will be recorded 

in the minutes of subcommittee B. The chairman or subcommittee B 

informed the chairman or working group Boo 1 that the work of the 

latter group is completed, and that no formal report 1s required. 

It &llJ' further meetings of the group are required members ot the 

group wlll be so adv1sedo 

cca &11 members Working Group lo. 1 

APSA-04'.r (Dr. S1Dkov) AFSl-12 (Col Borton) AFSA-OOT (Mr. Friedman) 

Arthur E erlin 

Commander, USNR 

Chairman. 

SECRET 

., 

i..LIJ 

"w..ru. w ' 
BRUSA COMSEC CONFI~CE 

SECOND REPORT OF S\JB=CCWITTEE B TO TH~ ~~cu·r1w COfAllI'lTEE 

Sub-Committee B resumed on 17 October after the arrival of 

Captain Hodges trom Ot.tawa. · 

The second report or the Sub-Committee is attached heretoa 

... 

'•.' 

,.-
~ ,,. 

Sl<X>ND R&PORr w SUB-CCIDlmEE B ·ro THE EXECUrIVi CQJall'fTIE 

1. Smb-Comlt.tee B hae Jllllde an exchange ot technical 1ntonaat.:loa 

coneend.ng vurioua c17Pt.o17Stema t1llin~ in t,he general aatego17 of 

11Spea:ial purpose teleprinter a.7ateu tor the exch!llap dl communicatJ.cm.1 

!Dtelllgance •tierial. n The crn>toa1atema discussed are dlviclacl into t.ha 

to.llaring groupas 

u.s. 

• u.1. .. -- Rollick 

SDCHftOIC!US 

APSAll-9, 1t prod.W wltrh 

IJ'ftChn'waou• ta.tares • 

5 u.c.o. (Se~pe) 

2o Tb• AP'SA!lll-91 lLSAlll 2-1 and Rollick are covered in t.ha ~ npore. 

of Sub-Canait.t.sa B. A deacr!pt.im ot t.be 5 U.C.O. le attached hento. 

3. 'fb• Sab-Comlt.tee baa the toll.aw1ng obaanat.ions and aonclui.ona 

to report. on apa~al purpose ttQ.epriater a19t.. tor the excbange ot 

oa-.m'lcatlom Snt,ellS.genQe material. 

a0 We note that !lockex 1a preaentJ.,J be1ng uaed tor the uobange 

ot ccnaun1cat1ona 1ntell.1genca •terial. 

b. 'Ile note that the 5 u.c.o. 1• 1n production and has bMn 

under teat. tor the pLat dx months, during part. at tbia 

period between Londcn :and Ot.t-awa. 

Co It 1a the 'Brit'llh naluation that the 5 U .c.o. 1a a true 

' J. 

- . d0 It is the naluation ot the U. s. that the ASAlll a-1 Td.t;h 

auit&ble cme-t.1.me procedure, attorde the 111ceaaa17 aeaurlt.7 

tor handling all cla•eU1oat1ona ot t rattio • 

. It. ;fe conclude t.hat: •'1-

-.... "".. .. .. ~ . ~ ' . a. It there is to be an 1mediate aubstltut;ioa tor Raolm& a ... 

•lection can be -4• froa t.he follGld.ng mdl1neaa 

,., 

. 

.- .\8a\ll 2-1 ' . 

' u.c.o. 

-· I 

~ 

) 

., 

.. ::. 

'b. Ei.t.ber aacblna 1a available 1n auttS.cient qv.ant!t.7 t.o _. 

current requlNunt• in the a.cbange ot c....,udcatlou 

' .. 

. . 

' 
• 

Sa In the course of the discusSLons on equipnent.s using on ... t.1118 

• tapea 1 a brief description wcis given of Br1t18h progress 111 kq-tape 

production equipnent.. In v18W or t.he close aasociat.ion ot such eqai.19nt. 

with one-time a7st.eu 1 it. is recomended that t.he subject of product.ion 

equi~nt. be added t.o the agenda or the next. Brit.ish-tJ.s. C<JI~ 

c:onterencea 
~ '· , .. • 

• REF ID:A67163 

Apparatus S UrC,,0,, Single Channel No 2 1 

On-line teleprinter cypher system,, 

Size and iVeight. 

6V lt 198 X 20n 

soo pound• 

• 

Out.line Description - Duplex on-line sfllchronous one-ti.Ille teleprinter 

cJPher system giving traffic flow securit.yo 

Technical. Description 

C;rzptosray;tiic features ·- Cypher key is p-ovided by cont1m:iously moving 

one-ti.ate S unit tapes,, A spool of tape lasts about 4 hours.., 

Jilectrical features ... Incoming t.eleprir~.t.er signals are stored and 

t.ranamitted.synchronously at 50 bauds after one-t.ime element by element 

encypherment.. The signals are regenerated bet'ore transmission to ensure 

pertect masld.ngo The received signal is likewise regenerated., A tull 

range ot automatic alanna against potent.ial insecurities is 1ncorporat.edo 

Por OOHQ operation special racil1t.1ea are provided. to secure exact one 

t.o one correlat-1on between characters encyphered and dec1J)hered (at the 

d1at.ant st.at.ion) o . These tacilltiea are tor handling 32 ·character intercepts 
/ - ~.-.-~ 

'I' OP Sl*llUi' 

aRUSA COMSEC CONFERENCE 

SECOND REPORT OF SUB-COY.MITTEE B TO THI!; EX~CUTIVE COIJMITTEE 

Su.b-Committee B reSU111ed on 17 October after the arrival of · Captain Hodges from Qt.tawa .. 

. . 

The second report. ot the Sub-Coirimittee is attached heretoo 
" -

'f 8P Sseft:ft' 

.IHJSA CCllSEC CCEFERr11CE 

SECO?m REPOR'f OF SUB-caarITrEE B TO TH~ l!:XECUTIVE C'ODlltTEE 

1. sub-Committee B has made an exchange of t.echnlcal intonation 

concerning Yarious C17ptoa111tems talling 1n the general catego17 ot 

"Spec1al )Jllrpose teleprinter s7st .. tor the exchange ot int.elllgence { 

•t.erial,, 0 The C1'7pt.08)'8t.a diacwused are divided :Into th• tollow1ng 

groups: No Ni -.S)t..) 

aarca "'/\. i.~ NQ!HDCHROIOUS UY OIKERAT<BS SDCHIUOOS 

AP&\11.c/ AS.'\11 2-1 AF&\11-9, it proYicled with 

8JDChron011• features. 

--- lolllck 5 u.c.o. 

(S.cratJP8) 

2. !be AFSAK-9, ASAll 2-1 and Rollick an covered in t.be ftret. :report, 

ot Sllb-Coamittee B. A description of the S U.C.O. is at.tachecl heret.00 

3. The Sub-Commlt.t.ee has the tolladng obserTat1cma and conclusions 

to report; en special pUJ"poaa t.eleprlnt.er s7at.ems tor the excbange of 

1nt.elligcce materials 

----- a. ~Ye not.e that. Rockex ia present~ being \\Rd tor the exchange 

ot"~ material.a 

ba We not.e that the 5 u.c.o. ia 1n production :md baa bean 

under teat tor the past six months, during part ot thia 

period between loadm and Otta•. 

c. It is the Brit;ieb evalvation that t;ha S u,.c.o. 1a a t.ne 

d,.. It is t.he enluat.ion of t.he u.s. t.hat. t.he ASa\11 2-1, with 

suitable one-time procedure, attorda the neceaa1:117 aecU1"it7 

tor handling all claaait~ationa ot traf"tic. 

4. Yfe conclude that: 

· a. It there 1a t.o be an immediat.e aubat.it.uticm for Bocka a 

eelect.1on cm- be made from t.he tollcnd.ng machine•: 

ASAll 2-1 

5 u.,c.o. 

bo &it.her •ch1n• is awUable 1n autticient. quant.it7 to meet. 

current requir•ent.a in t.he exchange ot 1nt.ell1gcce •t.erial.0 

----
' 

5. In the course ot the d1acusaicns cm equipaent.s using ane-tima 

tapea, a brief description was given ot Bl'itish progress 1n kq-tapa 

productim equ1)118nt. In riew ot t..he cloae associa.tion ot such equ1P1l9nt 

with me-time s19tems, it iB reconnended t.hr.At. the subject of product.ion 

~-l)~~~ • .-K 

equ1)ml8Dt be added to the agenda ot the next. conteence. -- I 

/\ 

fePSEllr 

2 

........ ______________ ...!!..,_::::.....:.~~ 

if©)~ SJEG~~,: 
- '•· .... 

Apearatua 5 U9Cn0o Sinsle·Channel Noa 1 

On-line t.eleprinter c7pher ·system • 

. Size ·and ·nSghti 

611 X 19n X 20" 

500 pounds 

• 

Outline Description - Duplex on-line G711chror_iows c>ne-time telej>rint.er 

cJpl'ler syat.eni, giving traffic flow securit7o 

.Technical Descript.ion 

. . 

Crzptogr&@ic features .... CyJ>her key is provided by continuousl.J moving 

one-time S unit tapes. A spool of tape lasts about I+ hour.,. 

JUecLr.t.cal features - Incoming tale printer signals are stored and 

tranandtted.-BJnchronousq at. 50 bauda atter one-t,ime element b7 element. 

enc7pherment. The signals are regenerated before transmission to ensure 

perfect masking. The received signal is likewise regeneratedo A tuu· 

range of automatic alarms against potential. insecurities is incorporat..edo 

For OOHQ ope~t.ion special tacil1t1ea arl!I prov1d.ed to ·secure ax.act ·one 

to one correlation bet..ween characters enc1J>hered .and decypbered· (at the 

"distant nation) o . Theae. tacillt1es are for handling .32 ·character intercept.a 
--- -

·- .,. i ...... ~ 

'7.i.. ~~-4...,,V 

The meetings of Sub-CcBl\t.ee B began m 'ZI September 1950 and 

continued 1nt.ermitt;ent.q through 13 October 1950. 

'l'h• 1n1t.1al report ot the Bub-Committee is attached h.-eto. 1'he 

minut,aa that were kept, of the aaat1nga gift onl)r a aumar7 ot the 

highllghta ot the various aubjecta dlacuased. 'l'heJ are on t1le with 

t.he recorder. 
~REF ID:A67163 . ~ ... 

'!'eP sggm 

T -.~ SfEC?RE+ 

13 October 1950 

BRUSA COUSKC CONFmENCE 

FIRST Jlli'PORT OF SU:S-COla!ITr~ B TO ·me; 4~U?IV.b: COIOl.l?f EE 

1. Sub-Committee B has made an exchange of technical informat,,ion 

concem1ng various cr,rpt.o syatems talllng under the ·roll.ming it• headings: 

a. lml _.l&chelon (including_ 1l1nor ifar Vessels) .. Ttllegraphic S78t.ems -

includiDg caabined assault, codes and tactical s7stema- tor all 

military Serviceso 

b. Jlercbant Ship Telegraphic Systems. 

c. Meteorological Secu:rit7 S7st.ems, including Facsilllile, Teleprinter and Telegraph. 

do Voice Securit7 SJBt.81118 tor Tactical. Purposeao 

2. During t.he course or the discussion and demonstrations 33 c17J>tio 

syat.elll8 were considered. Technical descriptions of 29 or t.heae are.included 

in the appendices as follows: 

a;. AFSAI 7 

b;. AY~AM 9 

Co 1 ilot.or .BCJ1 

d;, "PCM" 

8;, Melt 

Oo J4e1"CUJ7 

p. Concert. 

q.;, ftollie11: 

I"~ S1nglet 

So Pendragon 

t. 0 DUP. 1 

CIFAX 

t •· A&1. 2 

lo NIU. Cifa. 

a .. Jl&TFAl Q 

CI PHONY 

h •. ASAY 4· 

i. ASAY 6 

j. i&S•~Y 8 

k. AM/TRA 16 

1. TSS · .. 

v. Hallmark 

Wo Sorcerer 

Xn D '/9 

HAND SYsrars 

m. AS4D l 

n. Runnina l<ey · Clpher· 

· 7 o Pl.a7tex 

z. Llnax 

ea. Curaait ~,~co 

cc. Alailat.co 

Four others, ~he ASAJ1. ~l. the CCII. the Strip Cipher, and t.he ll-2Ql} 1 have 

no descriptions at.tached because of their familiar status in both countries~ 

·Brief mention was made of a modi.rication or the M-209 which has been proposed. 

by Hagelln. A description which he has submitted is included in the. append.ix.,. 

The appendix also includ.es·some miscellaneous .notes on general· itemao 

3o ~one or t.hese ceypto systems was subject.ad t.c. serious. deliberation 

as. far as security is concemed and on many or them no &'3c:urit.7 studies have 

iet. been made.. It. is t.he aim. or the Su'b-!=Committ.ee that these syst.ems ~ll 

all receive security evaluations during the in~erim between the close ot 

this conference· and the opening of the next.. 

l . 

i ' 
!eP sssm 

4. Incidental to the discussions of the various crypto systems 

consider.ition was given to the problem ot the number or different. sizes 

or rotors which are contem~lated for use in the mechanical crypt.~ ayst.ema. 

The Sub-Committee teals that the 26-pc)int rotor may have to be ·used for 

a long time to come but. that. some rut.ure agreement. is necessal'7 as to a 

selection among the )1, 32, and 36-point rot.ors. This agreement would Umit. 

'he number ot ditterent types of rot.ors employed and thereby facilitate the 

interchangeabilit7 between U.K. Wld u.s. sources. 

5. The Sub=Committ.ee has the following cbservat.ions i:ind con~us~ons 

to report tram its deliberation on the four items on it.s agenda1 

A. low Echelon (~.ncluding Minor :var Vessels) Telegraphic; systems ... 

1nclming combined assault. codes and t.act.ical syste• tor all 

dl1litar7 Services. 

1. ~1e not.e that. the lleet Code :ind Combined Assault Codes 

are under discussion 1n t.he UK - US JC~. 

2. -_le note t.hat. there are no other low ®halon &JBt.ams ,..t. 

·U114er considel'.9tion tor cOlllblned useo 

3. iYe note t.hat. bot.h US and UK have a numb1tr or new ~t:d.ne 

system.a under development. but. t.hat none or t.hese is likaq t.o be 4vailable 

· tor general combined use before "1954 o 

4.. ;te conclude: 

a. No machine syst.em is likely to be c.wail.able ~F 

general combined use before 19S4 ... 

b. U combined syst.ems are reciuired for any pur~e 1n 

the interim period.• possible &JBtema are: 

St.rip 

Lina 

Cursex · 

Pla1tax 

Running Ke1 Cipher· 

co To meet, the long t.e~ requirement.a tor low eeholon 

combined a7st.ems select.ions should be made wit.hin t.he next. 12 mon~~. 

Possible devices are: 

DUP 1 

AFSAll 7 

"PCM" 

AFSA.V 9 

iiCir 

CC>n&ert 

RO ill ck 

e 

LI©lP @~efRSlElf 
.. ; ~ "' 

• REF ID:A67163 ~ 

TOP SECRE=t=--. 

TGP alt;QJW" 

B. Merchant Ship Telegraphic Systems. 

lo i1e note t.hat. Cursex is under considerat.icn in t.he U~ 

JCEC and ·is likeq to be adc)pt.ed as t. he interim solution tor Allied Jlerchant. 

Ships. 

2. 'Ne recommerid that. a machine a~tem of a~ least. equivalent. 

~ecurit.7 but taster than Curaex. should replace . it, when available, ·and that 

such a system should be selected within t.he next. 12 months. Possible devices 

are: 

"PCM" 

OOP l 

AFSAll 7 

MCJl 

Co Met.eorological Security Systems, Including Facs:lmile, releprinter 

.and Telegraph. 

l. ·\Ye note t.he lack or aey ·suit.able combined ceypt,o system for 

meteorological. purposes. 

2. le not.a that. both the UK !Uld US have Wiler developneilt new 

meteorological a7atems in. the f'ollowing.categories& 

Air-Ground 

Telegraph 

Teleprinter 

Citax 

3 o · ·,'fe note that with tbe except.ion ot the Air-Ground syst;ems 

none of the SySt.8118 under developnent is likGq to be available tor general 

coilbinad use ~tore 19540 

4-c. ·ae · note that requirements and characterist.ics tor combined 

. . 

plain t.ext tacs1rid.le equipment a have not; yet been ~ed upono 

5o 'Re concludea 

a. lo machine cl"Jl)t,o system tor meteorological purposes 

is like~ t.o be available· for general ccmbined use before 1954. 

b. If combined systems .are required tor inetec>rologlcal 

pmtpoaes in the 1nta:r1m ·period• possibl• dfticea are: 

(1) Air-Ground. - ASAD l 

et..t.co 

Alaiaetco 

· (2) Telegraph - ·CCM (modltied tor weather encipher~) 

· · Pencil and. paper ayst.•· tor Y•r'J" low 

echeloil rmrpoaes .• 
z: ": 4t: REF ID:A67163 • · 9P1 SEGRE ;e-

'f0P SEeft!l' 

(3) Teleprinter ... ASAU 2-l 

(4) Facsimile - None available 

co· To meet t.he long term requirements for enc1pherment. of 

meteorological data selection should be made-within the next 12 monthso 

Possible devices are: 

(1) Ai~ound - ASAD 1 

ctmetcQ 

Alar.let co 

Any available cipbo1>7 system 

(2) Tel·3graph - BCK 7 wit.h p-ovis1cn . tor weat.her encipher= 

ment 

AFSIW 7 

"PCJI" 

Singlet. 

Pendragon . ll'UP l • designed tor weat.her enciphenneni 

Pencil and paper systems 

(3) Teleprinter ... AF&AH 9 

.ASHK 2-1 Conc~rt 

Rollick 

l!ercury 

(4) Cifax - ASAX·2 

HRL Citax 

?i&'TFAX 

MOTE: Selection in cat.ego17 (4) •Y not be possible unt.11 an 

. agreement. 1a reached in· t.he Ul-US JCAC on t.he requireaenta 

and characteristics tor plain t.ext. taca.tmUe equipments 

and associated t.ransmission sy_atems tor meteorological useo . . 

D. Voice Security Systems tor Tact;.1.cal Purposes. 

lo _ Ile note that. t:ihere are no ciphony systems under consideration 

tor combined useo 

· 2o tie. note that. both the UK and the US have a number of new 

ayat.ems under development bu.t. that none or these is llkeq t.o be available 

for general cam.bined use betore 1954. 

3o We conclude: 

·. 

a. No c1pho117 system is- likeq to be available tor general 

combined u.se betora 1954. 

. b. There are no poasiblllt1es for suit.able devices in the 

interim period., · 

· co ~o meet. the long term requirements tor combined clphOllJ' 

syst.ems select.ion should be made "1,thin the next 12 mont.hso Possible devices 

are: 
'POP S:Oe~i' 

(1) ASAY '• 

(2) ASAY 8 

(3) Hallmark 

(4} Sorcerer 

(primarily designed as a low echelon 

ciphony attachment; can b~ used only 

over.circuits or·r.e:rmal bandwidt.h) 

(designed primarily for airborne uee; 

possibly suit.able tor general low 

echelon use; can be used ~it.h VHF 

transmissi0n only and is capable ot 

group working) 

(primarily designed ror tactical point. 

to point circuits using VHF or wideband circuits; could be used to provide 

secure point. t.o point. teletype and 

facsimile tranSllliseions) 

(primarily designed far paint to point 

cipho117 over long and ~hort distar.ca 

circuits or normal band width) 

. (5) AN/rRA 16 (primarily designed for microwave point. 

(6) D-70 

to point radio· relay links, carrying 8 

voice channels; can handle teleprinter 

with treq~ency multiplex) 

(primarily designed tcr microwave ·point 

t.o point. radio relay links, carr~ 12 

voice channels; can carry facsimile or 

~~laprinter .;ith rrequenc1 multiplex) 

60 The Sub-Commit.tee has the rcllowi.ne reccmmendations t.o make: 

a.; Thai immediately and on a continuing basis, t.here be complete 

interchange of the technical details of t.he systems discussed in this exp:B:oratory conference., This should include teehni~al visitso 

b., Tha~ discussion and in~erchange or technical intormation on 

cert.ain other it.ems or canbined int.er-est, such as the security aspsc:t.s of IFF 

and aut.hent.ication s19tema, b9 authorized. 

c 1 That security ,y~~~~!i~f ~f mad~ an~ ex~ari.ged on a~ i~ems 

discussed~ 

• TOP :H«:ftlf 
-- - ·- - . . . 

'f'OP 3E611!! 

d. · That a copy of the final report or the conterence be submitted 

to the UoS~-UoKo JCS: and t.hat.. t.he u.s.-U.K. JCEC be requested to consider 

and. resolve as a matter of urgenc7 the operational requirements in all fields . . 

ot Combined Cryptographic Communicationao 

e«> 1'hat t.here be annual conterences on these subjects tor the nm 

tour years, to be held aaernateq in. U>ndon and in ~·1a.ahington, t.he t1r~ ot . . 

these to take place in london in ap~aximat.elJ" nine l_llOntha time o 

6 

TOP s~effR~if 
•ij• -. ;:-

.. 

Size 

-

• 

.f; 'r 

• 

a 

- AFSAll! 7 

OFF-UNE P~TIID CYPHER Mi\CHmE FOR T ACTIC,~L WE 

12" wide by.12" high by~" deep, approximately, less case. 

14" wide by 14" high by:S" deep,.approximat.ely, in caseo 

We&sht ·15 lbs lesa case; 22 lbs in case. 

Outline Description - A keyboard operated, tape-printing c7pher machine 

24 v DoCo operated (with adapt.or tor 115 v - 230 v AC operation). Encyphers 

letters and figures. 

Technical Descript,ion ~/ . 

CrlJ?tograehic features: ~ig~t~-poin~ rotors with independent. 

alphabet and notch r~s.. 26 way input .:i.nd out·put, 10 paths be.iM re.entrant.» 

Rat.ors 1-3, 5-8 turn.. Mot.ion is electrically cont.rolled by sensing not.ch ringso 

Motion is "!nterloc~ed cascade," rotors 1 t.o 3 providing a dilated c;ycl,.c.meter 

giving a. guaranteed minimum C)'Cle. Machine is considered secure under all . . 

usual sorts of misuse. Read before step operation. Clear indicators are usedo 

"-. 

· ·Mechanical Features: n tl,ying type wheel printer is used carrying a 

pUlse generator on t.he same shaft. o. 0n depreasine a key ~ circuit. is· set. up 

t.hrough one st.at.or coil in the pulsa general.or. . l\t. t.he appropriate time a 

pulse is generated in t.his coil which tires a thyratron operat.ing t.he prir.t 

magnet." 

St.at.e ot Progress •D In an advanced st.ate or dev~lopment,, 
.. 

Al'SAU 

OJf-LDI S WAY J'llMOtllP ClPHij§ UAQJmn; Fat. NifRDJ'l'"iR USE -

J6rr x 12" x 6" leea cue 

18" x :14n z 8" with Oa.n 

Vlair.Ja. AppzimdmatoJ.y Z1 lba USS oaaa 

Approx.1.matoli' 35 lbs with caa 

91tlim pe~ - A taotJ.cal hich oecoriv teleprinter cipher 

machine a.ocept1Dg tel.Bprintc- a1gnale u an input and pl"cd&lcing teleprinter . - . 

a1pls aa an output.. IinploJS 8tart-etop ~hronizatl.cm. . . ' 

li!n!PY'PP"t - For ·use· •revar· teleprinter is · eiDpl.O)'ad :1n tactical 

" 

eohelonao .(%actical \Jae ot· teleprinters iB plarmad on a bx'oad acala as 

lm aa ros1ment; Ol' battalion). 

Tecbpicql Desor1pM.on .. Accepts an· input telotqpe aicmJ.1 et.ores tb8 . -

tin intellipnoe ·bauda, t;ranalatoa to om hot. :alre of 32, _ permted in a 

:rotor .mase,. the ciphal- signal tranalated to t.ha five unit code tor atorage, 

and then transmitted in· t.imo aequenceo _ Capabla ct opezi'a.tlna at. tolaprintar 

epeeda mm ~o to 100 Wl'ds per minute. 

Cgptoqephio teaturea -;- Plnp.\OJB Dine 36-point rotors ~ the ~ 

with 4 cdrcuite recmtriod to rowce to a 32 a.meter anc1phe~. Elght 

r~ora ~ in an interlocked cascade t'iith the center rotor nol; moving mt 

fized for the dq~ 'lbree l'O~rs antamaticall1' sOroiZGd to a pre~ 

poaition betoro~ ea.oh maesace. . Planned tor use in a S-latter oloar t~ 

indioatcr w.ith no restr.lcrid.ons as to uae •. 

§tate ~ Proqesa - ·In advanced de'Nl.opment. PrototJpo iaodw apocted 

Spri.ng 19'1.. 
.. ... 

g 

J ROTCR BCM (CSP kSOO) 

G:f-UNE 26.aUAY PERMUTING MACHINE 

She 1619 w.ldei b7 1211 hish b7 l211 de«rip8 appraxillnt~ 

Vlair,b1 100 lbs spprax:lma.teliJ 

Pstlim Doscripticm - "'! rotor mchaniam using the, carcase of CSP 1700 . . 

(CQ[ 1llt II) Tlith a. .einele tapo printGl" and a .nan-J.ccldng kG1'boax'do 

Technical Desg.ripticm. ... 

9£.vptoeyapbic Foaturesg 7 rota.Ir ElOlP.reciprocal mazeo Planned to 

. uoe removoabl.G not.ch rinco and alpha.bet tyroeo Ral#orn are reversible. Prem 

gZ-esm.cm is notch cont:rolled.o Lilml,y orde of drive is 4 6 2 7 1 S 31 with 

la. 6 and 2 .f~ a cyclamter a.nd the rest moving as in CCM. Rotors 2 and 6 

always step backnardeo Altelm.tion ot tho direction o£ rotation. ot any rotor 

involvos n1>chanical. -aorko :Maze is rood before ateppingo Bo.cktmrds and 

forwards notion occur sir:W.t.anoousl¥o 

Mochanical Features g ·Non-lccld.ng lii-benlt k<>Jboard with the nwnerala 

l to~ on the top banko . P:rintor is ma.pt opomtedo 26=-letter_ sinele case 

enc:vphermo.ntr onl.7• Printer h!ls 26 lettax'sa space and munsrals l to J6 on]¥o 

Facilitios 'avr.1:-tcb eives following conditions a 

o- off 

P .... plain {in this co~tion all keys 8.1'8 ettoctive) 

D - docypher 

E c. encyp:tm> 

R ... rGset (in this condition the roton can be acat. by thG f~ 

lmye l to ?) 

Ha..nd...dr.1. ve i'acillt7 ct ~ 1700 has been abandmled, and the ~ration is ~ 

lorr volto.geo An AC r.iOtor is :ei.:ttcd, arid the print.er, otco is directJ¥ AO 

opora.tedo 

Another fac1lit7 srdtcii changes from CSP 4SOO to CSP 17000 In the 1700 

condition blank rotors are inserted in positions 2 and 6_ (the bacbarda rotors) 

am theso rotors will turno . . 
• 

.!, --_Jini\t: A67163 

""KbRCI 

a. 

7 ROTOR BCM (gsP MOO} 

OFF:J..WE ~U.jJ .P~JUTIIlG .W1<JimE 

Kechi!?1aal. Features• (Continued) - -

A variant ot th1a mach~ for wathor operation .. (i.e, mst) was also 

Shom. · ~ \'BOa.tbar ant~ ~at.a the ti£ure~ 1- to ,;. ~co and x cm. 

cm~t -1;0 the maze. and cm deeyphem~. c~cts t.he. appropriat• man . -

outplita to the uum.eri~: ~ ot -the ~ter.•. . 

Ae an alternative to .this scheme the- eam&· facUitica r.ay be prOvidecl 

l>J' ua1.ng spacial plllga and sockets connected into· the Gmkea. 3oinins the 

. -

· scrazabla to t.he macld ne baaeo . -

2 

-\ 

IEClff 
• 

d 

-

"PCM" 

Size i cubic toot. - 12" x12" x 611 

~ approximat.eq . 

. Weight lS pounds 

. . 

. Techriical Descript.ion - T~1s· machine is crypt.~raphicall.y ident.ical with 

the CSP 48000 The rot.ors, apprax!mat.ely 2~" in diameter will use removable 

notch rings and alphabet tireso Permit.a direct encrypt.ion ot numerala 0 

state ot Prcgresa ~ Engineering model _to be tt.elivered about. 15 November 

19.SOo 
... ,_.:.; .... 

.. 

:3I!:CU£1' 

Size 

-

CSP-3600 (J.!CW.) 

OFF-UNE JiAGgLIN-TYPE CI.PHiia MAit~.JE 

• '· ... ~ ;;_:~~.· •• •·; ' • r .. 

10" wide b7 10" high by 611 d6ep ~Pi>ro;x:~t,elyo ~:·:=::;;_ ... *'·:~...-~~ ~~ :.:·."·:. .. ·. · .. 

•Veight 12-16 lbs approximately o 

Outline Description .. Keyboard operate~! --~~~~f.~~ting ~~~~~ W!'-~. 

intended tor ve-cy low ec~elon ttseo Hand powe~~· !.~~~~.-~visio~ ·'~~?·~~~If . . . -:.: . .... . .. __ , . ~~ '<#-~ cation to motor drive o 

Technical Description : ::. 

. ;·. 

Q.rzytographiC 1'"eatures: 12 Jll ... 209 pin wheels add~ ~q~~ ~g~~~~ o I "• "' • ·~.~: .. ·~-~···:-•'-.:.-""I 

effect to a comon drumo K~y is the result of two steps ot ~~~ . ~ ~:~~~-o 

··; . .-..:., 

Pins and lues are settable, with a maximum of 6 lugs to a ~!! · :: : .. ·<( 

.. ~ /=·~:j •, . . ·. .. :.. . .' _ 

_; St.ate or Progress ... In development wit.h one prelimin~y., ~21!?.'-~ ... . ...··$;.:l!f,,"'"''~ ... ~~·.'"'·4;. model available .:;- · ·· ·.~~:: · · - ·':. ·'·: · · .. ' <·:·.:d: ·: 

. ;··:~:} ·f~;~~; . ·"·· . . ~-' .: .. : ... .... ;r 

_<M. : ~ ~~ =:. c ' 

...... ~ .• ~ .. '• 

. . .... · .. ' - t 

' ...... ,. 

"r :' 

. : .· .. : 

.··; ···. ·' ··. :..:·:-

........ 
r 

=. 

N . ASAX 2 

CIFAX TMK,CEIVJ!.'R. FO~ US& .~rrff BLACK~tlHITE·COPY, PRIMARILY FCR Vil!:J\'!'Hi:;R MA_PS 

l Rack approximately' 24'0 x 2611 x SA&" 

l Power supply ap~tel.7 14" x 24" x 10" 

Including approx.instely 150 vacuum tubes o! which JJO are dual 

triode so 

lieight. 400 lbs., 

Outline Description - Medium-high ochelon. 11 ·high security citax, transmitt.ing multitone cipher at effectively 1009 elements per second, produced 

'1>7 synchronous biM>ry addit.ion of' 2-level quantized facsimile signal and 

~level keyo 

Tecbn1cal Dascri.ption 

Crxptotechnigue: Six basic sequences produced a~ 6000 elements 

par secon~ are combined in a CCl!llplex mnner to. produce a 2-le't·el key at 

. . 

1000 elements per second. The basic sequences are produced by six contlnu .. 

a117 rotatiilg relatively pr~ wheels (in the range 101 to llS).o 

Electronic Feat.ur~: The ASAX 2 is designed. to transmit. over 

loo...2750 cps land-line or HF radio., either or bot.h being in~luded in a 

single circuit o Cipher at. a l millisecond rate is read successively int.o 

.tour channels, each ch:innel being amplitude :nodulat.io~1 or ~ :.iudio subcarriero 

A ,ntth eubcarri:er is amplit,ude modulat.ed by a SO cps signal !or ~ut.omatic 

· ... phase c:ont.r~lo The composite signal is transmi~ted. directly on land-l~e ~ 

medulates a conventional (double sideband AU) HF radio t.ra.nsmittera 

The receiver port.ions or the ASAX. 2 are equipped ror automatic sta.rt.ing, . . . . .. 

s711chronizati0n, continuous ·phase correction, and 81.arndng, including indicatlQn -ot each function .. ·. A frequency standard .is included fol' use when manual. 

~ntrol is desired, ... 

State of Progress ~·rwo terminals," originally designed for engirieering 

·test.a, have. gone through limited service testing on land-line and on HF radio 

~ks up to 1000 mileso Technically', performance ot the equipment. was 

sat.istactoey over normal ranges .-9t room temperature., 
& 

NRL CIFAX 

CIFAX TR.'\NSCEIV ~ 1'"'0.R BLi.CK-~'UdI'rM; WEATHER COPY 

Can be convert.ed t;.o .tull ·duplex by addit.ion of a second key generator~ 

•ieight 

Transmission equipnent. 1611 x 19" x 7211 appr0x1mately 'i' 

Key generator 1611 .. ·x 19" x 24" approximate]:y._· 

outline Descrfpt~()li -·~gh security, -shipboard and.base station citax, 

. ·_. .. J,'~smitting mult.1tone cipher _at ef'tectively 1000 element.·s .per second, . ' . . . 

· ..·:produced ~7 ~nchronotia · binaey addition of a 2-level quant.ized facsiniile 

·signal. and 2 ... 1nel .kf1y~ 

'l'echnical Descri:ptlon 

Crxpt.otechnigue: Eig~t basic sequences are repr()d~ced at 1000 

. . 

element.a pe.r second from continuously rotating wheels that are relativel.7 . . prime. Eight. wheels are selected f~ a set o~ 28 in the range 101 to 199'" 

Four sequencee are birlar7 added t.o produce X key, whic~ ~s recorded as a 

continuously traveling magnetic tape having 10 reading ··h•ads. A tour stage 

ri~g Picks oft X key from various preselected reading heads t.o produce Y keyo 

X key and '! key are binary added to produce t.he _final out put. ke7 o Two or 

the unused basic sequen~es are.added "Boolian to determine when the fotir 

stage ring ls :reseto The remaining two basic sequences determine to which 

position the ring_ is reset vilen a reset -is demandedn 

Electronic Features: Th~ NRL citax equipment. transmit.a AV sub--

carriers ~ the r11nge: 2000-3750 cps, e]&ht. channels beir>g tra11smitted over 

Class A telepboae _Una 0r HF a1ngla sideband radio. The equipnent incorpor"lltes 

prec18ion trequanc7 atand.a~s with provision tor manua). or automatic phase 

correcUono 

St.at.a ot . .Progress - ho models have i:eceived engineering tests and. 

ope~ate sat.1stact.or1q. Four se~ce t.e~t models are pre_sently being . . . . ~· . . . . . . . .; .. . 

~ampletecf by• ~tra.ct~o 
.. 

11.· 

ASAI It 

. TIME DEIAY SCIWl!BIE CIPHONY SYST.l!2! 

~ 1211 X 1211 X 1811 , ·est.imat.edo· 

Weir.ht; lS pounds, est.iinated a . 

· Outline I>aecript,ion =The individual elements within a group ot 20 

elements· are delayed different amounts nf time ·befof'e transmissionn . ) . . • "! 

· Technical Descript.ion.,.. A 17 x 20 element matrix code bmc control.a the 

delay of t.he specific element.a ot speech in ea.ch group ot 20 element.so The 

same code ia used for at least one co~rsation •. · · The key code control is on 

a tape and is ,advanced one step to .a new . pOsit.ion. ·,~bet.her chi:U'lge is to be 

on ·a oessage .or time bas!S has not .fat been establl,13hed. 

State of Progress - &tginee.ring models are now under dwelopment.., 
... ! REF ID:A67163 

.•. 

! . 

ASAY 6 

Size Three bays appraximatel.J Si.x 2~ x l! teet"' . . . .. 

Weight Approximat.ely 2;0 pounds per ba7 plus spare part.a and t.est, 

equipment. 

Technical Description .. SpeeQh is col'l'lert,ed into a 1500 baud per 

second on-otf aign&l by means ot a vocoder and PCM coder. To this signal 

is added a ket sequence from an·associated key generatoro Transmission 

is acccmp~shed by eight frequency multiplexed channels located.in the 

standard voice treq,uenc7 band. S!x ot these ·channels are tor _speech · 

inf'or•tion, one is tor sJiichronization_and one is tor statian selection. 

The.receiviq end accanplishea the reverse operations ot t.he t.ransmit.ting 

end. Each t8rminal is tull duplex0 

Crxpt,ographic Feat.urea •The key generat.or makes u·s.e of the geared 

. . . 

timing mechaniam t.o produce six basic sequences of 1011 10.3. 101, 10911 

113, and 115 elements length. These sequences are combined by a.ddit.1on 

and nmlt1plicat1on in eieet.ronic circuits to prodUce o~put. kq at .1500. 

elements per second. The basie patterns are changeable as well as the 

individual starting points.of each sequencea 

Stat.e of ~sreaa - Three models or th~ equipment are under conat.ruct.ion 

by a cont.ractor. These will be engineering and servic• t.ested t;o detiermine 

neceSSBl"J' modi~ications. 

1ttiBEJ I 
~- ... REF ID:A67163 

SEOI~~ . 9 

-s!leB -

J. 

. ASAY S 

SINGLE CHANNEL PCU CIPHONY·SYSTEM 

Size 

- 2 cases ·each 12" x 12". x 1811 eatJ.mated . . 

1ie1Bht SO lbs. , eat.1mated0 

General • The s1stem is intended for general airborne tactical usage by 

. VHF radioo 

Outline Description ... A single channel FCM s,atem which emplo79 "push to 

.talk" t.ranscs1ver element scrambling or a block or 32 pulseso 

Technical Descript.ion 

Cr1ptg1raJ?hic Features: The PCK coder out.put is 11 tlat.tened11 by 

means ot "a~t.o key techniqueso" The least w.ipt baud ot each· speech sample 

(4 digit FCK) is deia19d muJl.t.iplea ot tive elemantso This causes it t.o b8 

added to the8 weight. bauda or the next sample, to the 4 weigbt bau4a ot the 

next sample after that• and the 2 weight baud of t.he next. sample ~t.er ~t;·o 

A. CQde card o~ rotOI' system is us.ed to determine a transposition 1n a block 

ot 32 elements .. 

~ate ot Uevelopnt - Early developnent. 2nd ~ineering model to . . 

be built by contractor. Air tran&miasion t.est; plaon.,_ o~ lab (lodel. · 

ltCREl 
S36Flm 

k 

..... 

AN/TH.A.~16 

8 CHANNEL SPEECH SYSTEM FOR MICRO-WAVE RADIO 

§!!.!. 1 4if.lba1'8 (counting 100% st.andby) 

~eight A~out 1 ton (2000 lbs) 

Outline Description = Enciphered PCM syste.~ tran.s:nitted by on-oft 

pulses over micro-wave radio. The channels are in time division multiplex. 

Technical Description 

Crypt.ographic F~atures: The machine employs a key generator I 

using tour whee_ls. or length ll; 13, 20, and 28. 'lbe mot.ion of those 

wheels is· controlled by plain text PCU elements cllld partially enciphered . . 

PCM eleiaantBo 

State or Progre@!_ - 'l'wO terminals are nearinr. completion for use in 

a special experimental.radio ~o· Several terminals without complete 

keyer circuits are available,, 

IEGHET. 

.. 
... 

• 

1 

-

T.SoSo 

' Tactical speech encipherment system primarlly tor aircraft ·useo 

Size and ~'leight -.About 10" x 1011 x 1811 and weighs 39 poundsa (Thia 

is 18 element model.,) 

Outline Description -.A TDS system er encipherment applied to PAii 

speech samples. Uses a fixed aelt-conversing code changeable . bf means ot 

a switch matrixci 

. Technical Features - The set employs a rotory beam tube instead ot 

a more conventional ring circuit to control the TDS operation. Two mcdels 

ot the system have ~en built, one em~loying a 12 element TD.:> the other an 

18 element TDS. A 5 to lO kc channel is r_equired to~ transmission., The 

system 81JlChronizes phase automaticall.70 

~ate ot Progress - Two models at each ct the two t1P•• will soon be 

- available for testing., 
···-

!. 

REF ID:A67163 

SECRET, • 

m 

- ASAD 1 

la ASAD 1 is · ~ si18ll hWl;d subst.itution device·, designed . for use in 

multiseat.er aircraft r~r the transmis~on or ess~t.ial meteor~logical . 

~format.ion. 

2. It consists or a bla~k box about.· 1211 x 71" x .1~•i in. dimension~ 

cont.aining a· letter. k~yaroll which can be r~t.ated horizontally and over1.'lid by a ste~il which can be rotated vertically a The stencil containS 

i,, liJ)ea each designated by the type of _inf'onnatic>n involved (ea:g 0 ciou:d . . . 

~e~. vis1bllit7, etcq") and_ containing up to 20 holes desitnat.ed bt · 

numbers, directions1 et._c. Ttius, at. any position or the .-stencil or key-

,roll, there ar• lJ lines showing different types or tr:ir.brrntion, _and the 

·,:.~ct. detail can bei designat.ed by. the letter appearl,ng; i~(.thc_ appropriate 

holl) on t,he· line. 

lo The key-roll.is J)rOd~ced so that a let,ter never repeat.a within a . 

. ~eries ot 20.; The stencil ia ~•signed so that it cove~j 8,veey ot.her lin~- . . 

and colUllll Of. the ke7; the~ are thus tour indeptnde~ keys on t.he roll. 

The roll can be set. in 100 .po•i~ions and the stencil· in 26 ~1~ionso Tha . . . . . 

setting numbers are sut;,stitute'd 1nt.o random digraphs by means ot an. indicator table which tits int.o a slot above the wind~ of' the device. 

4;. The crypt.ographiQ Principle is aimiiar. t.o t.hat of the British UCO 

or AIAllJ!."'TOO, and the ~st,.em · can be used ~or t.ransmi.tt.ing t.he same ~d . ot 

intormat.iono A wider choice ot ~1 is ~vailable owing to t.he· lengt.h .or t.he· ~ . . 

ke7"."'roll and the prin~iple · ot dual alidea 
•• !- -, 

REF ID:A67163 

IECR~1T 

RUNNING Kl!:Y CYPHER 

lo RKC is a literal hand substitution cyphe~, designed to give a 

high degree or security on strategical links wher3 machine systems a.re 

not· availableo 

2. The cypher comprises a book ·of random lH.eral l<oy-groups, and 

a book or random 26 x 26 letter substitution squares, one tor each day 

of-the mont.ho For po:tpt-to-point working, the keybook would be used 

"once through" each day, commencing at. a point. chQsen at randan in the 

table; t.be system can also be empioyed for group working, choosing a 

·;random starting-point for each individual. message. The encrypt.ion 

process consists or substituting each plain-text letter in turn against 

its associated. key-letter, emplo7ing the substituiion table valid tor 

the dafa 
REF ID:A67163 

IE~~~l 

I 0 

- MERCURY (LATE TYPEK Mic 10) 

SJnchronous on-line teleprinter cipher machineo 

Size One 59 6" rack and four special tableso -

·weight 450 lbs 1 ve'l7 apprrudmately 

Out.line Descript-ion - 31 way rotor perrmiting cipher machine using 

s~parat.e turnover control and ciphering mazeso 

Technical Description 

Cryptographic Features: A 4·:rotor.cyclometric maze controlling 

.. a·:·t, rotor .ciphering maze. Rotors consist of Z:ii"l cuter. annulus· (carrying 

progression notches). with scrambled wiring und a separate inner rotoro 

:The two parts can be assemb.led in 62 dif'terent wayso Current traverses 

t;~ t.he outer rOtor aect.ion~then through a scrambled t.um around end. 

plate and then returns through the inner rotor sect.ions. Cryptcgraphicall.J' 

t.heretore the mazes consist. ot 9 and l3 :rctors respectivel'o 

Mechanical Features: MarcV, is a· duplex o.n•line s7nchrcnoua 

-~ipber s7stemo In-coming teleprinter signals are tried o~ to 31 wais and 

tad onto altemat.e storage deviceso :iignala are .f'ed stnchronousq to t.he 

maze and t.heri reconvert.ad t.o 5 unit code tor t.ran.smisaiono The maze ia 

at.eppecl &1ftchroriousl7,e1 In the no tra~ic condition the. lett.ere function I ' . 

is. sent "en cl.air" t.o line o 

State or Progress ... One circuit on traf't1c experiment;al.170 '. I 

IEBllEF 
REF ID:A67163 

a 

CONCERT 

ON-LINE TEIEPRD.T3R SYNCHRONOUS .CIPHim MACHINE 

Size 1611 x 811 x 8" _approximatelya 

Weicht ·40 l~s approximt.el.f o 

Ojttline Description • A synchronous on•l1ne subtract.or teleprinter 

cipher machine tor general t.act.ical usageo 

Uaa.ge • ?he device is planned tor larg~ scale t~ct.ical usageo 

·Technical Description 

Cr1pt.o&raphic Feat.urea: Maze consist.a ot 11 wired rot.ors periods 

41, 4J, 43; 45, 45, 46,· 46, 4?, 47, 49,. 490 Rotors l, ~. 511 1·.f) ·9,. 11 turn 

regular}T one step per elamento Rest st.ay st-illo 8 or t.he 49 paths through . . 

t.he ·maze "drop" ott" at various points. · 24 ot. 49 input,s are energized with 

bat.tery through push-but.t,ons and seven or the·u outputs are tapped and 

fed into rel&J'Bo The seven relays perform modulus 2 addition in aeries Qn 

the plain teleprinter element. tor enciphenuento Rapid clearance ot push-·. 

buttons is providedo Rotors not int-erchangeable; ~otat.eable ~lphabet tyre:io 

' . 

The device is capable or providing several streams of simultaneous key and 

will still '·be secure 0 

Mechanical Feat.urea: The maze t.urns, cont.inuousl7 driven, t.hrough 

a ditterential gear. box tor pha~ing purposes trom a magnetic amplified 

contirolled motor 1.t high "Q11 circuit is used fol". t.ime· cont.rol. Element 

storage is provided.· Traffic is enciphered on an element. by ·&lament basis 

including at.art and stop signals t.hereby giving traffic_ flow securit.7 a . 

§.!;ate ot Prosress - Two lab models made from drawings are under testo . . 

Development or the t.ilsle control teat.urea is ~CQJD.plet.e. 

~y 

'@fil=ll'J.:JMBQ--
REF ID:A67163 

SEGRH 

.a 

· llu,'R 

ONi;JHE TELEPRnrrm OIPHm DMCE 

· .aa, Ole 416" telegraph· mck an castors· 

Vldnh' 100 lbs ap,groxlmat.ell' 

•• 

09tlin! Descr1pt1cm - la oiec~ operated balf.-duplox ()Daol 1ne 

telepr.lntor mbtra.ctor anciphement dstr.Lce. 

. . 

. Cm?tographio Foatu.roa: See note• on Coc1G-Rob1n. ·(Its ee). 

!ha cipher key is· senerated b7 cold cathode gas tubes. Provialon 1s ma.de. 

tor genera.ting rand.an iodica.tora not um.er contl'Ol. ot the oporato.r and 

. ' 

tor autanaticalll' posit10Dins the Im7 generator to tbeae indicatm.-s. 

Mechanical Features I 'lbe . molo equip:lant is electranioe Moot; 

clr~ta ·uae ~ cathode pta tu.baa. 

·. ~ - · 1he ~1'1ca 1a intead.ad in1Uall7 tor '1se on GCIQ land line 

oiroUita. A bU:1o concept baa bean the me ot electron10 teo~a IO 

. . 

aa to .p81'111it ~ mass pl'Odmt.1.0Do 

'• 

nata Qt P£s>ma1 - .,_ models now being baUt for 'UfJr tdalao 
•. 

• 

Gomrfl - Sinalot is a keJ'boo.rd operated motor-driwn• tape.op~ 

ott"..J.ine pezmutJ.Dg cipher macb:lmo The kQboard coriesponds axactll' to a 

standard. tei,printer .ke7hoard aeept that there 1a ~ ad.ditioml k91 ca1]a4 

a. "Bigram. K87"•· 'lho tall r~e of ~printa:ir lower and upper case ~plbols 

U'8 av1d]ebJ.e ~ four latter ka;ra and _carriage-return ud ;line-teed reqube 

the pre-Opera.tiOD of the b1grem lmJo 

1'he ma.chine is designed to 'liork · frcm 100-.125 volts or ~250 wlta 

45c-65 c/e mingls phase. It can be .talmn through tha batch at .a ail.mmrineo 

· Deta11r .. ibe machine 'Will have a 26-wq mau with 7 or JDON roto~ 

. . operating O!l'l Beu p!'inciplas but co.n also be used u tar CCJI world.ng. It all 

use Jaor1can tJpe rotorao . . 

Pg fqr Hoteorol.e-1raft1.Jl • The inclwllon ot .full. ·Cas~ 

tacilltioa· eliablos ~e mcbim to be ued tor metem-ological tnf~oo · Since 

nom ot the bigrammad al~ e_rct used for th1e type ot traffic the ope~ati·m 

of the lmJboard ill axactll" the 8QID8 aa that of a st;a.adud teloprintaro (lot 

a waathar ke.Jboard,) o 

staH of. Proms• • 1ho mo.china 1s still under devalopnento A development conliract ~or proto1i'Pe pro_ducticm models will p:robabll' be placed 1n the 

SUmmer at 1951. 
. . .;- ·•, 

• REF ID:A67163 

Qemgl. • Pendragon is ~ off-line cipher nnah!ne ~iDG ~ perforated 

tepe 1Dpa&t and produciDg a pase-prin1;ed "copy on. a temprinter and ~so, U . . 

required, . a perforated tape on· a printins reperforatoro 

Dae :lDput tape can be prepared. on a atandard. teleprinter ptrfaratOI' 

· wd.nS tho full rana~• ot toleprinter a1gnalo. Bicnm e1gnals are auto- . . . . m~cal.l¥ imserbod. by the equip.mont 11h1~ has a. 26-wq pe:mm.ting maze 

uactq the samo as. t.ha.t used :ln Sinaleto 

Pendragon 11111 int.erwork uit.h Sinclat and can also bo ·used for CW 

. Qr' J3CU .wo.rldng. 

Dote1 l p a '!ha min unit will be identica.l \U th Singlati except that 

the keyboard_ Gnd. pr:l.ntore will be ~pla.cod b7 0. control wdt rm- inserting 

carriage return and 1ine-toed, etc. 

'SQ.ta· at Proe;reas • Devel.opnent is proce.sing in· par~l td th the 

~ on Singlet and it is e,Zpeoted. that; bot~ singlet and Pendragon will 

became avid 1We .ab9U.t the . aama t!me • 

... 

~ 

U&;al~ 
• =· 

• REF ID:A67.163 

<Jemra1 - DtJP 1 1s an oft-line hand op8ro.ted tap~ cipher 

mach1na with _an electrical pennμtirJB maze, 1N1gb1zJ8 about l8 lbs. Its · 

~naions are ~" z 6~11 x '"• on the model demonstrated, tm 1Dpllt 

ia controlled bJ' a netting knob alm:t lar to that of H 209 'but lmJ'bcard 

opemt.i.an could be arnngocic•· Elactrical pmar is supplied 'b1' a s~­

ccmt;a1ned 45 volt drJ' batt.er.v which nivos ao,ooo operations or more~ . 

For 10\7 tarupezinture operation, an oxtemal sourco of pcmar is noceSSU"J'o 

!lgta1 '1 - Tho maze 1s ~ and has 8 rotors at whim 1 and S are . . 

fast turnin& 21 3 aml 4 be1ne drivon c~calJ1' b1' 11 am1 61 7 and 

8 CJOl,amotricallT driven b1' So 

1be ~ha.Yo alpha.bet tJras rotatable with respect to tuzn.or_. 

pattema, and :NllJIOV'able 1l1r1nc inserts which can be ·fitted ~ afl1' om ot 26 . . . . 

positionao 'l'ho turn,...Onr pattCll'D 1a the aame on 8YGJ!7 ~ in a set and . . 

th~ are 16 w1rinc: inaerta to each sat.o CompraDiso at the machine and .. 

wJ.rin8~ 1s . oonred b7 the f'act that adequate seaurit7 1s s:l:ftn. in the dailF 

setting. 

Uae. fqr l[oM9roJ.og1ca1 'l'taf'Ac - Propoaala ue und.- ccmalderation 

tar encipherment ot numarala and the latter. X b7 the uae of .a anu.alJ:' . . 

operated. case abifto . . 

§,ta.ta Q( Pnmna•. - One ~ mde model ha.a_ been ccmpleted and a1x 

more are under conatrw:tion. A dnelOpm&nt contract ·ma been placed f~ the 

. . . . . 

.manutacture of 50 mod.el.a ~ared tor large scale producticn and 1Dtonded. 

tor Service triala.. DeliYel'J' of t.he1e protot)'pe procmctiQD mod9la 1e . expected 

to ccnmence daring the_ Sumner ot 1951. 
.. . .• ·•. 

• REF ID:A67163 

a. 

~ - Ltli1M'AX 18 a a19tem far tho onc1pherod k'aminiaaian of black 

and Whito ~teoroloaical aharbao It. is intondod to aet a requirement tor 

the tmnamiaa:1on of oha.rta ~n x ]6n in o. time ot not .r.iore than 30 mimltea 

with a definition ot 100 linaa per inch, the tranacd asion abanml (lim or . . . 

H.F.) hav1na a band-td.dth ot 300 to 3,400 C/S. 

The enciphsring ecpipmant; v4ll conolst ot one mok 2011 wido b7 6 • ~ 

empl.oJ1ng abo.it 200 valT08o 1he de~horiog equipment 1.s ot about the aama 

Aocordi.IJg to present propoaals tbs intelligence will be ancipheioed. in 

an 8-1R1i1 elootri.cal parmuti.Ds .mase 'llO:rld.Dg cntireJ.y ele~o 

Detail.a·:- 'lhe picture 1ntell1gonco is quantized 41 500 this per seaonda 

that 1s a~ twice· the nmd.nal picture elemont rate &D as to a'IQld de~tian . 

ot definition. Groupu of 3 quantized elamante are comrerted to signals on 

om ot eight wires ha.Ying a recvrence rate of 11 500 per second. 'lbose 

a5gnaJa u-o pe1'r.Dlted mid connrted to eigAa.1s havinG om ot eidlt lovela 

for tranmrd.aaion b7 · F .u • 

. 'Jho p8fllll1tc-11ill have eight at.asee (i'Wheel.e11) with pluggabl.e tumaft1'1 

patterns and changeable wlril'JB&o 1he latter will comdst ot pazolin cude 

with r.iotalized. strip connoct1onae The variables will be turnover pattemg 

order ot progresa1.on and l'lirinso The deciphOl'ins oqdpmerit 11111 be started 

:mtanaticalll' aD1 its speed w1U be controllod b7 d1fferant1a.t1on of the 

!noomina algmls. 

sty! of Deyelopnpn\ - ~Jc to lxLok labora.tol7 tuts bave beep mde 

ua1lJc brea.di-board asaanblio&o llreo.d-boarcl aperklents at . the transmisaian 

aquipn.ent are proceeding. 

'l'he alactronic P8J'C111Hr m:r later ·m replaced b7 a Bollick k87 generator. 
~-

lh\hl:MAim 

PCM CIPHCNY SYST.l!Jl FOR ir ACTICAL USAG.tj; 

Sizer and iYeigt!t - lab models consist ot one S96n racko · iYeight, 300 lbs 

appro.ximately'o Pac~aged equipment tor vehicle use plannedo 

Outline Description -· Duplex .32 level PCM subt.ractor encypherment. c1pho117 

system tor pqint.-to-poirit service11 

Tedlnical Description· -

Cryptographic Features: Subtract.or encyphermen~ using bi,nar7 key 

from a group of t.ransit.iO.n counters o! inodull between 2 and 29. Counter~ 

are reset automatically' by a maze at periodic ~tervalso 

Technical Features: Duplex operat~on using a common key generator 

giving different. key to go and return channelso ~aming, synchronuation, · 

.JRU~ s~epping, et.co is automat.ico .. 

St.ate or Development - 6 ·copies ot lab models being made for special 

GCHQ circuit.a. Development contract placed for engineered models tor field 

uae,, 
~- . , 

~frril~: A67163 

~tt:®Ub~O 

I 

.... 

. ypPamR SPEDI smrum ~- FOR GgimAL US.AGE 

(Planned) 2 doubla ald8cl rackB 5•60 h1gb. 

600 ll>a 

Os'Wpe Dgspd.pt!op ... P.CU Vocodar amll'aia and. Q'l1theeis qstem 1d. th 

aubtraotor eno.vphermult for operation Oft!" c:lrCllita ot nomal_ bmlw:!.dtbo 

!tchnical Descr1pt4.0g 

Cmtographic featmaa m~t rill be .bJ' using the OoclG- . • 

El.B9.H"J.ca1 f9twea1 cm pitch and eidlt epcectrum chlmmls. 

Pitch ohamela ~ defined to 16 ateps1 the apect.rum to 8 steps• Opt1oml . . . . 

prov:lid.on ot tm tranamiaaion qstems1 om rcr land line and ·VHF raclioa . . I '. • 

Operating at 1800 bauda, ~ a nmlu.abannel V .F. 8,18tall 170 cpa apacing 

and a 100 baud speed on each cbaDD&l. Proria1on cm be .made tor a aecun. . . 

tel.Gprinter channel i'or Ol'de .. win parposaa it required. 

§.ta.to ot Dey!l.eme!it - Developmsnt Contract plaood ni.th a contract-.~ . . . 

·. ~T ~LIWJJlc:r-
REF ID:A67163 .... 

fL7Q 

MULTI...CHANNEL C~TDIE."l'RIC· RADIO RELAY .EiUIPMi!M, 

S~ze and Weight - Duplicate equipnent consisting ot 4 transmitters~ 

4 receivers, antenna masts, etco, carried in- one vehicleo DUplicate PCM 

multiplex e~ca~ carried 1n a seconcf vehicleo 

Outline De.script ion - Centimet.ric radio relay syst 811\ providing l2 

top s~cret. speech channelso 

Technical Descr.lption 

CrzJ?to.graphic Features: Encyphe~ent is carried out by th~ 

. Cock-Robin prin_ciple (Item ee)o 

. . 

Electrical Features:. The equipment is .f'ullJ duplicated with auto-

_matic ·change-over tac111t1eso The 12 PCU channels are carried b7 F.M on a 

6em radio llnko An engineering channel is also p~ided using the spectrum 

below 4 kc/so PCM syst.em 18 analogoμs tQ Hallma~~-" 

• 
.... T 

REF ID:A67163 a_· 

SEB~~W • 

l. 

PLAYFEl (SIWL SHIPS CYFHl!Jl) 

1. Playtex 1s a t.act.ical band syst.em, designed to -_effect a verr rapid 

change ot code with a minimum or dOcwaentation and product-ion. It. is cs~c1ticall7 intended for use 1n small ships, and could be cployed tor any traffic 

where short. term securit.7 is r8'1Uired and where a quick enceypt.ion process 

on a basic ~~ is operat.iQD&lq accept;abl.8 .. 

2. In i~a presmt form·· it. consists or a two-pal't. (hat~ecl) basic codebook, in which each vocabul.81'7 sSgnit1cat1on is given a two-olettier group,, . 

. omibt.ing double let;t.ers mt" t.he let.tier J. The groups ti'all .tbe basic code-

.book are ·then encyphered b7 a double Playta:l.r ·process, based on a pair ot 

S x 5 squares chang.\ng every t.10 hours. The keybook CQnsist.s-ot 31 det.acha• 

ble pages, each containing 24 squares, di~ded into 12 pairs designated b7 

~he two-hour pe_riocl tor which they are ~id. Each ba•ic ·group is enc17pt.ec1 

on tJle le.ft. hand square, anct" the resulting digraph enc17pt.ed on the right. 

hand ~re. No Wicator is required other than the date..;;t.ime group ·of the 

message0 

3. Tbe keJbock is designed· so that squares val:ld tor a period short.er 

t.han 2!+ hours can be issued -tor. aho:rt. tront. Une operat.ions. It a higher 

degree.of securit.7 is required, the ba$l~ ~k can be changed mont.hq, . . 

the ~ic groups writ.ten -o~ on' a k97lengt~-' and t.he Playtair encrypt.ion 

applied to. the verliic;al digraphao 

. 4o The small ships basic book and some edi Uons of the keybook have 

~en produced and are rea.cV tor issue it required., Field t.est.s have proved . . . 

satistactor7, but, ·t.he system rul& not ·bee~ used ~perat.ionall,Jo 

., .. <.. ' . . .. . .... . ~· : - ~ 
• 

... 

•• 

LINEX. 

1. . Linex is a ll~eral hcuid substit.ution cypher, designed t.o give a 

hi.P, degree· ot security tor f()rward-area .strategical traffic, where machine 

systems are· no~ available, . lt ~s t;>een in use 1-n the British Army forward •.' . ., . 

of Brigade.since 1944. 

2. · The _cypher consist.a or· a book ot 25 pages or mixed alphabets, use(! 

in association with.10 cards known as cursors. ~ach cursor is designated by 

t.wo or three letters, and contains a mixed alphabet. along t.he top _margin and._ . . 

a hole cut in one ot ten positions on ~he right margin. The user selects one 

ot the cursors and.marks a letter in t;he mixed alpha.bet, as determined b1 the· 

indicat.or. He tinds the st.arting ... point in the ke7book, . and places the marked . . . 

let.t.er under the firs~ plain-text letter ot the message; the cypher letter 

is read trom the hole cut a~y on the· right mare;in ot the CUJ;"sor. The curSOI" 

is then moved down one alphabet in the keybook and the .process is repeated 

tor. t.h• second plain-text_ ~etter; and .so on~ letter ,b7 letter through the 

· 'message , using a new alphabet. tor each encrn>t.ion •. 

3. The -message indica~or consist.a of a tour-l~tt.er group selected from 

·a page ot random gr0upa; the two_ pairs· ot let.ters are encrypted._b7 a sing].• 

Pl.a7ta1r process,. to give the cursor and start.ing-point..for .the message • 
• • 

.!,! 

cu.RS.EX 

1. Cursa is a literal hand subst,itution cypher, designed to give a 

high degree or. security for strategical traffic where machin~ systems are 

not, available. It is· specitiaally int.ended for use as a combined merchant. . . ·.· 

ships• CJPher, and would be suitable for_ use on st.rat.egical links or.· as a 

general back-up to machine systems. 

2. The cypher -consist.a of a book or Ut.eral key, used in association 

wit.ha frame containing a horizontal-~ a.vertical- sliding ~eysheet made . . I 

up or· a number ot mixed alphabets. The plain t.ext. is mtt.en under the . . . 

gro11ps in the keyl;x)ok, starting at a point determined by_ the indicator, .and· 

each of the keysheet.s is set. up at one or 26 posit.ions in t.he .trame. .Each' 

letter or the text is then encrypted on the alphabet indicated by the 

~s:.sociat.ed key-letter. The key•letter is tound in the alphabet on the . . 

horizontal keysheet' and t.he subst#~lltiori alphabet is. ~aken ~ the vertical . .... . . . 

ke7sheet, t;he process being·. tacilltat.eJ b;r ·the use or a curs0r sliding . 

vertically over the frame. . I 

J. Several specimen frames ·and ke;rshe~s have been produced, and .field 

t.est·s have proved satisfactory. 

.. .. 

\ 

0 
.. 

•• 

bb 

- Ol'IE'rCO 

l. Otmetco is a hand aubstitut.ion cypher, designed for providing 

essential meteorological 1ntormat.ion to aircraft returning from operations. 

It can be used to transmit. baranetric pressure_, tollow~d by visibility and 

cloud-base 1t required. It is intended to pl.ace t.he minimum burden on t.he 

a1rcratt.. 

· 2. All ground~stations hold a .book containing 1000 ~e~ alphabets, 

each designated bf an indicator number. Aircraft are provided with a prof'orma 

card, com.~ing an extract consisting or three alphabet.a from t.he book, a 

key baromet.r1c pressure and one or more letters indicating "plus" or "minus". . . 

?he k9J' pressure is obtained oeparate}Jr by each ground-station, by app~ 

a daiq-changing key-number to the actual baromet.ric pressure observed at t.he 

at.at.ion.at a predetvmined time. 

3. When t.he aircraft r8t.'1ftla t.o base, the ground-st.at.ion trans:nit.s the . 

·barcmet.ric pressure as the dleviat.~on ~ millibars from the k97 pressure, in 

. . 

the torm.ot a two-letter group; the tirat. let.tel"' indicates "plus" or "minus", . . . . . . . . . 

t.he second let.tar the deviation in millibars up to 25, as cietermined bT the 

tirst · alphabet. on the card. It required, t~e ·cloud-base in hundreds ot te.~t 

(up to 25.00) ia transmitt.ed as the appropriat;e letiter from the second alphabet, 

··and ·the v1sibilit7 in hundr~s ot yards (up to 2500) from .t.be t.bird alphabet.. 

4. In ~tion to the station key pressure, all aircraft. in an area are . 

pven a dai:J.7-changing diversion ke,y press~. It an aircraft. is diyert;~d troin 

base, .it requests a. repo~ b7 transmitting its 1nd1cator.pumber, and t.hc 

ground-statie';)n bases its reJ>l.1. on ··the diversion k&y pressure. . . 

5. Each indicator is allocated to ·one operation only, so that. the key 

is virtuall.7 one-time, the only repetition being when a· ~~ibilit.7 or cloudbase alphabet on one operation may be used as a barometric alphabet on a.not.her. 

6. The ~79tem is at present being given ~ield ~eats, and prelimi~ry 

indications are that it- will prove aat.ist~ctior7. · 
.. 

• 

ALAME'l'CO 

lo Alametco is a hand. substitution cypher' designed tor the 

transmission of meteorological information between ground-stations·and 

aircraft. It'has·b&en in.use.in the RoA~F. since the latter part of the 

war. 

2. Aircraft are ~vided with .proforma cards, ·containing a number or 

lines devoted to various items of meteoroloeical intormation9 with blanks 

left tor the insertion· ot letter keys (similar to the stenci~ on ASAD l). 

Before an operation, the ground-stat.ion tills 1n the card with a number ot 

mixed alphabets ·derived. !ran a master key-book and changing dail.7. Any 

item can_ thus be expressed as the line-number in the proforma followed by 

the letter appearing· in the appropriate space. Each aircraft normally 

carries more than one card, a different series being employed for area 

broadcast so 
.. 

• 

26-Point Rotors 

REF~i&6f163 

IUiR~I 

gs 

ROTORS 

• 

It has been agreed on Sub-Committee A that rotors on both u.s. and 

British revisions ot the 7-rotor BCU should be physically and cryptographicall.J' 

interchangeable. The size of. r0tor proposed (3~" diameter) is that now used 

on CSP 1700. ~t is= also propo·sed that the physical design shall as and when 

possible take the f'orm or a rotor with a solclered-in wiring b~bbin, a 

. . 

removable turnover cam:i1 and a removable alpb:ibet tyre each o.r which are in 

ettect capable of rotation. The rotors m1J.7 be reversed by interchanging the 

position or the turnover cam and the alphabet. tyre. 

For li~tweiSht machines· it ha:s been proposed that a rot.or or simiiar 

design but having a diameter ot 2~" (as used on PCM) should be ~ployed. 

l! Point Rotors (U.K,2. 

A 31 point. ro~or ot ~pe~ial design is. used in Mercury (British on-line 

teleprinter permuting system). 

The rotor consists of'. an outer reversible scramble-wired annulus with a 

tixed turnover pat.tern and fixed alphabet tyre, in which is inserted a second 

scramble-wired cij.ec. The insert. ma.7 be fitted in a117 one of .Jl positions and 

is reveraibh. The maze circuits first pass t.hrough·the inserts and t.hen 

ret.urn via the end plat~ through the annuli.., 

36 Point. Rotors (U,S,)" 

'nle U,S, is developing a 36.point rotor tor use in new cipber machine 

developments. The figure 36 was chosen to allow encipherment or the 32 . . 

charact.er teletype alphabet, the 26 character literal alphabet., and various 

aj'st• wirings. Two pt17aically' identical fi;ypes of rotors are being developed; 

one ~t whose wiring is _capable .ot being "plugged" to ·any desired scramble,- and 

a "9Cond whose scramble wiring 1• "printed" on a replaceable ,Plastic ~sert., 

Eaeh rotor coned.at.a ot 4 parts, a main body, a not.ch ring, an alphabet.. 

r~, and a lock ring. Tbe main body contains .36 flush commutator con~act.s 

on one face anci 36 plungers on the other face. The notch ring is inter.-

changeable between l'Otors andgaitho\l8h it is not reversible, can be· placed 

in 36 ditrere.nt positions with respect· to· the alphabet J,"ing~ Th~ riot.ch ring 

SEBR(i 
~ ... 

• 

dd - Rotors (continued) 

provides st.epping control for t.he maze. The alphabet ring is used as a 

drive ~~ and tor message indicator set.~ings and contains 10 blanks on 

its peripheey" Opposite the letter "0" is a depression used to "zeroize" 

the rotor. The lock ring holds the assembly" together. The daily set. up 

will consis.t. ot assemb~ the al~abet ring in the proper juxtaposition 

to the main ~~s index mark, picking the pro~r not.ch ring and placing 

i~ in J)r9per· j~apos~tion to the alphabet ring and locking.the assembly 

by means ot the l?ck ring. . . . . 

i'he design goal was t.o produce a new rotor which would ease:t,he rot~r 

wiring problem and be c:apable ot large scale pl-oducti~. 

. . 

'l'h.e cil,meinsions are 3.7" OD. 0.,42" thick, and .a hub bore Qt 0.30". 'l'he 

expected normal. lite is .o~er 200,000,000. operations .• 

.. 
• 

COCK-ROBIN 

1. -Note: Cock-Robin is a basic cryptographic principle, and has ~ . . 

lll8llJ" applications. It. can be produced both electronic:ill.y and mechan!call¥. 

It ·is described here in one· application as a key genera~or (Rollick) tor 

on-line teleprinter encipherment but other applications are mentioned in 

descriptions ot devices using it. 

2. Components: · The generator has 9 cold cathode "decade count.ere 

divided into three sets A, Band C. Each set has one counter.lo, o~e 9 and 

one ?. All three count~ra within a set are driven simultaneously by mean~ 

ot an ori/ott gate. .ieveral ot the cathodes in each set. are tapped, strapped 

togetru.r, and led Qft to control the. other two gates. Another. sel:~ct.ion, 

possibl.T overlapping, ot the·cathode is made to produce three streams or 

mark/space ke7X, YI: z, which are added Jll!Ddulo 2 to produce the final _ke.Y 

element • 

.3.. Mot.ions The "motor" output ot set ·A ·turns Gat.e B on·· if there is a 

voltage :present, and t.urna Gate C on 1.f there is no v~tage present.. ~ B 

controls Gate C and A, and Set. C conti"ola A and B 1D the same .wa.7. · A ·gate is 

therefore onq ott it there is. no voltage trOm the preceding set and t.here is 

a voltage trom t.he toll.owing set. ;'lben t.he nUmber· ot tap.Pings _in the various 

sets aatiat1. a certain eond~tion, t.he. cycle is the guaranteed itaximUm ot 

· 10 X 9 X 7 cubed. 

4o Ke1: Stream X 1• ·obtained b7 tappings from the 10 coWiters··in 

Set. A, t.he 9. in B and the 7 in. C, these tappinga being litr.apped to g1,,e Boolean 

addition. _ Y is obtained trom the 10 in B, the 9 in C and the 7 in A, and Z trom. . . 

t.he 10 in C, the 9 in A and the 7 in B. X, Y and L are then added· modulo 2 

tor the final ke7 element, which is added t.o t.ha plain teleprinter element.. 

5. .;-lettings: All the -tappings ot. cathodes tor key and motorization· 

are co.mplet.e~ pluggable, ~d obviously change ot plugging, which will 

probabl.7 be dail.7, gives a change ot machine. Message settings can generall.T 

be produced aut.onaticall.7 (see descr1pt.1on'of Rollick). 

't d I 
·~ ..&· 

CIPHONY SC~ FOR GROUP ~IORKING 

Outline Description ot Proposal 

A scheme tor quantising speech into sa;v 8 levels and permuting 

t.heae levels in bot.h elect.ronic ahd. mechanical. (maze) permuterso 

. Synchronization of the 9lectrcnic circuits can be acheived on a pu.sh ... 

to-t&lk basia 9 the :mechanical parts by a clock mechan18Jll. In this 

manner the advantages ot permutation can be used 1n mitigation ot loss 

of security due to transmission in depth. 
{ . . ~. /_!. ~ 

B!tUSA COMS.IOO CONFERENCE 

]1is1 REPCRT OF sus-cot.mmm B TO TIJ!!; · !!;XKCUTIY~ COMMir?i!:E 

The meetings ot Sub-Committee B begiln on 'Z1 Sept;ember 19SO and 

continued 1nt.ermittentq through 10 Octobero . . 

l'he final.report. ot t.he Sub=Comad.t.tee 1a att.ac;hed hereto. The 

id.nut.ea tha~ were kept. or the mest.ings give onl.7 a summary ot the 

highlights ot t.he various subjects discusaed. The7 a~e on tile wit.h 

t.he recorder. 
. · . . : .. ·; 

'POP SSSRE'l · · 

R~PORT CF sus-cc:.'MI'f? ~ B TO rm~ ~X3CU-rIV E CCMMI'rTEE 

.·19 Sub-Committee B has made an exchange or technical· inf'ormation 

concerning various crypto ~yet.ems falling μncier the following item headings: 

ao I.ow &:hel~n (~ V~ssels) Telegraphic Systems .;,. . ~ 

including combined assault codes and tactical systems tor 

aJ.l military Se_rvices o 

b.. Merchant. Ship 'lelagraphic Systems: .. 

Co Meteorological Security Systems, Including Facsimile 11 

Teleprint;er and ~elegrapho 

do Voice Security SJStem& tor Tactical Purpos.eso 

2. During the course or the discussion ~ d~nst.rations .31 ceypt.o 

s7st.ems "Were considered. Technical descriptions ot 27 ot th~ae are included . . .· . .. . . . . . . . .. :.· .···· 

in the· app~icea as follows: . .. ·. ~ .. · . ..... 

a.; AFSAJI 9· 

bo Mercury 

Co. Cone~ 

d~ Rollick e~ 1

AFSAH? 

to \ PCMU 

8.~ Singlet. /, ho Pendragon 

io DUP l <I j~ MCM 

ko 7 rot.or K:M 

l. ASAI 2 

mo NRL Citax 

·n.;. *'l'FAX 

j 

Oo ASAY 4 P~. ASAt 8 

q .. Hallmark 

r. Sorcerer 

Bo D ?0 

to AN/rRA 16 

u. Pla;ytex 

Vo Lina . w. Cura ex I 

Xa ASAD l 

7· Otmet.co 

Zo A.l.ametco 

aa. · Runrd.ng Ke7 Cipher 

Four ct.hers 11 . t.he ASAM 2-l~ t.he cc¥. t.he ··oif.rip Cipher,' aiicf the 14 ... 209, have no 

description& at.t.ach~·'becau~e ot ·t.heir' familiar· at.at.a in both countries. . . . . 

3. None or t.hese crypt.o systems was subject.ad t.o serious deliberation 

' . 

as tar as security is concemed and on m8.1i7 ot t.hem no aecurit.7 studie~ have 

. . ~ 

yet. been made .. It is the aim of the·Sub-Committ.ee t.hat· t.hese ayat.eme shall 

all receive securit.y evaluations M aeh: able dur.lng the 1.nt.erJ.m bet.ween 

t.be close ot th.is~ >ncl th. opening ·or the· next.. . . 
..... 

• !'I 

' 

'f'OP Sffif:Rh"i' 

4o Incidenta~ to_the discussions ~t the various:c17pt.o s.Y'.s~ems 

·cansiderat.ion was given to the problem ot th~ number ot ditt~nt sizes 

ot ·ro~ors which are· eontemplated tor use 1n the mechanical c1'"7pto aystems 0 ·. 

The Sub-Committee feels_ .th&t the 26;-point rotor may have t.o be wied .tor_ a 

long time to come but .that some future agreement· is necessary as· to a 

~leet~n among the 31, 32, and · 36-poirit rot.~ .. ao 

So : The Sub-Committ.ee -has t.he toilwinl observations and ccncluaiona . . . . .. 

. . 

to report .trom its deliberat-ions ori t.he tour itema on it.s agenda·; . ~ ,·· ... · 

A\o Low .Echelon (Minor War Vessels) Telegr:iPhi~ Syat.ems ~- l' . · including combined assault codes und t.act.ical systems 

tor all military Ser'fic;:ea~ 

lo 'Ne note . that. t.he Ple~t.· Code and Combined Aeaault. Codee 

are under discussion in t.tie UK - US JCECo. 

2_o We note that t.here are no o~hel" Lo1' Echelon SJ"St.~ yet. · 

under consideration f'qr combined useo. 

4. 'lie conclUde: · 

. ao: ··No machine. s79tem 1a- llkeq to be availa))le tor . . . . , '\'\S-4 . general c~in~d. uae ·befora~ . 

· . b0 It. ccmbined a,.tema are required .tor. aft7 purpose in 

t.he interial period, poasibl!I ~are-~ . ' 

~rip 

·Lina 

Curaex. 

Pla7fex . . Running Key Cipher 

Co. :'l'o meet. the long t;em reezuirement.s for ·l.OW echelon 

combined systems.selections ahm;ald be made Wi~hin the next. 12.mont.ha. 

Possible devices arei 

DUP- 1 

.AP'SAJf? 

''~" .. APSAM 9 · 11Clf 

c0ncen· 

Rollick· 

Bo Merchant Ship Telegra~ic S7st.ems~ 

l. We riOta tha~ Cursex is under ·cOMS.:deJ'at.i~n· in t.he. US.UK 

JC~ and is llkel.7 t~ be adoPted as t.he int.erim soluti~ t.or ~ed · Kerchant. 

Shipe·~ 2 
,. '! 

/ 

·· REF ID:A671~ . · 

P~P~m f@~ @~©H~I!~~ 2. .le recCllllllelld that a machine s:ll~ faater than Curaex 

should replace. it, when available, and that, such a syst.e?I _should be selected 

within t.he next 12 mont;hso .. Possible devices _are: 

y. ·ECH 'I 

OOP l Al~ll 7 

MCH 

Co Meteorological Securit.7 Syst~s, Including Facsimile, 

Teleprinter and Telegr&pbo 

lo Ne note the lack of any aalitable combined ceypt.o system 

tor ma~aol!'Ological pwrposeso 

20 We ·note that both the· UK and US have under development. new 

m~eorological. sTStoems in the tollovdn£ categcr1esa 

Air-Ground 

Telegraph 

Teleprinter 

Ci fax· 

30 We note that •dth the exception or the A~und a7at.ema /A·. 

nonq, ot the systems under ~evelopment is likeq t.o be available tor<iMN 

. . . l~.!"~·· .:*'ct' ea ~at 1 general -comb1n~ use betore,_p,_AS!S;; 

4o We note that requirement.a and charact.er1at1ca tor caabined 

plain text. facsimile equipments have not 19t bean agreed upono 

So . We eopcl.ude a 

e.o No machine cr7pto system fer meteorological purposes ia 

llkel7 to be available ror gener:JJ. ccmbined use betore.:~"""1'1a a 

. bo It combined systems are required ·tor .mat.eoroloaical 

purposes in the 1nt.ir1m. period, posaible devices ares 

(1) Air-Ground - ASAD l 

(2) 

(3) 

(4) 

otm.etco 

Ala.met co 

Telegraph ~::~.c~D/f~~μ~; x:ither enciph _ 

Teleprinter ... ASAM 2-1-"-••-·-~-~~~ 

Pacs~e - Mons available 

Co To meet. the long term requirements tor enciphe.rmen.t. ot . . . meteoll"Ological .data ·selection should .be made within the ·next.· 12 mont.ha .. 

Possible devices ar<11 

(1) ASr-Ground .. ASAD l · Ot.inatco 

Alamet.co 

An7 available cipho117 ·system 
~· 

.. 

(2) 

(3) 

Telegraph - ~M 7 with provision for weather encipherment AFSAM 7 . t.. PQ}( l\ 

SingJl.Gl'i. 

Peadr&gon 

DUP l - .designGlo't to·r weather enciphenumt. 

Teleprinter -

r~·~~~ AFSAM 9 · b-·. - - ASAU 2-1 

Concert· 

Rollick 

Jie!'CU17 

C,J 

i10'11'!$:: Se!act,ion 1n S\til!ll cat.ego17f\m1q no~ be ~sible until atm 

•Namiaiiit is reached in the UKaUS JCEC on the requirements and characteriat.ice 

lo"!' plain t~ fac~ird.1'31 equipnents and associated t.ransmi•sion 11at.~ for 

.mit.s~gicml 'll!Ho 

l>o Voice Sacvit.7 SJSt.ema for Tactical Purpoaeao 

lo We note tba.t there are no c1phor17 s)'St.ems under consideration 

tor ccmb1ned uss" 

2" •ts .. note t,hat bctb the Ult &n~ frbe u~ ~· a ~rlL~ new 

91at~ under davelopnent.~ ~~~~'4 i' iia -~1BJi Mteb &JO "'"°~· eoarl~ 'D• 

~4.rl!;;::;-- a.,., .• J,..."9-~ ~<C\.t""4 .. •llMD1"17 nt•~ !bJ> ft& cdlll1lt1ud a~ W), ~9"o· 

3~ W~ concl~s: · 

&o lo c!.pho117 system is lllcel.7 to be a~ailable tor general 

combiDGd . . use befOI"~ ....,AJ'p& ·~ '"t!·' l9Sza= . · 

'bo. There~ no poss1bilit.1ea tor suit.able devices in the ~ .. -~ 

c., . ·To meet the long term requirements tor Canbinecl ciphoft7 

ayat-ems selection ·ehou.101 be mdG9 wit-hin t.he next; 12 ~ha. Possibl~ dev.iaee 

(l) ASAt 4 

(2)' ASAI 8 

(3) 

(primarll.7 designed as. a low eDhelon ciphQ111' , .. ~~~~ .. 

at,tachment ff\ anr ~Ucuite ot norma:f :bandividth) 

(desip.sd pnmariq tor aii'~crne ueez possibq 

su1tab:b tor gen~ral low echalcn use~ can be used 

witoih_VHF transmission only and is capable ·or group 

working) 

· (primarilJ' des:laned 0 tar tachical 

~ po~ to point. 

oircu.1ts uaing· VHP or wide-band circuit.aJ coild. 

bo used t.o provide aecUl"e ~ t.o .,Oiftt teletJ'i>e 

amt taca1m1le,t.ranadasl~) 

4 
. . ..• ,. 

I 

(4) Sorcerer 

(S) Atl/l'RA 16 

(6) D-10 

(primarily designed tor point to point ciphony 

over long.and short distance circuits or ncl'lial 

band width) 

(primarU,. designed tor micro•ve point to point. 

radio relay links, carrying 8 voice channels; can 

handle teleprintel" with frequency multiplex)· 

(primarily designed _ior microwave point to p~int. 

radio rel.&7 links, carrying l2 voice channels; 

can C3JT7 tacsimlle or teleprinter with f'requenc7 

multiplex) 

6a The Sub-Committee tv1s the follovdng generul recamnendatiOn& to make: 

.a. Tha\ L~nuilig·'oasis-~/ complete interchange or the technical details or. tho systems discussed in 

~ ... - explorat017 conrerenc,,. '.!his ohould include tecbnical viaita. 

f(o That security evaluations be made and exc~anged on all itema 

diecWI~~~~"\)~·~ ~~*iA._ · 

~ ~ c\c •. Thatf\~UoSo....UoKo JCEC k:.~~~sider and resolv!JwhheeCA-a c:...... 

it•l9' t'h~nal requirements in 1111 fields ot Co~ined · Cr;yptcgraphic . 

~ •" -· ,.Q •. 1\ . .._, ·. ;;.:~ \I.I.,~~ 

.1&-et!PY181l conterencei'. be held ,...ln ~bout n~e montha/\. to ;;,ive 

selections ot it.eras t.o be reco1DA18nded tor qcmbined ado~i~ ~. 

~--.;~to That. discussion and i~terc~a.nge ct t.echnical intormat.1.on on 

cert;ain other it.ems ot combined interest• such as t.he security aapec~' 9£ IFF 

and aut.hent.ication systems, ·be aut.horiz8do 

s 

TeP smm 

-rop S@:e69ET 
·i 

····~ 10 October 1950 : : .. · .. 

llliPORT CF SUB-CC:.'~11'1' ,C;:!; B TO rm~ ~X::!:CU?IVE CCMMITTEJ!: 

·l'J Sub-Committee B has made an exchange of technical information 

concerning varioua crypto systems falling μnc!er the following item headings: 

ao Low Echelon (Minor iar Vessels) Telegraphic Systems -

including combined assault .codes and tactical systems tor 

all miliiary Services 0 

bo Merchant Ship Telegraphic Syst.enul. 

Co Met.eorological ~curity Systems, ~eluding Facsimile, 

'f eleprint.er and Telegrapho 

do Voice Security Systems tor Tactical PurposesQ 

2. During t.he course ot the discussion :ind demonstrat.1o.ns .31 cr,ypto 

systems were considered. Technical descriptions ot 21 or th~se are included 

in the appendices as follows: .· ·. ·. 

a. AFS.W 9 

ba MerC\ll7' 

c., Concert. 

do Rollick 

e~ Al"'SAM 7 

f., PCl\i . 

g~ Singlet. 

ho Pendragon 

io DUP 1 

j. MOH 

k., ? rot.or D 

l., .!\SAX 2 

m. EL Citax · .n.. J!i!,TFAX 

IDo ASA! 4 

Pa. ASAY 8 

q. Hallmark 

r. SQll"Cerer 

s., D 10 

t. o AN/TRA 16 

Uo Playtex 

"" Lima 

Wo Cursex 

Xo ASAD l 

y., otmet.co 

s ., .A.l.alut.co 

aa D Running Key Cipher, 

Four others, t..he ASAM: 2-19 t.he CCU11 tJle .-it.rip Cipher, ami'the y .... 2099 have no 

. . • .. 

descriptions attached. because ot theiz"tamili&ll" ·stat.us in both count.riea., 

)., None or these crypto systems was subject.ad t.o serious deliberation 

as fa~ as security is concerned and on ma!l1' ot them. no security Studie~ have 

yet. been madeo It is the Dim of the Sub-Committee that these systems shall 

all receive eecurit.y evaluations on each side during the .int.er.lm bet.ween 

the close or this session 311Q the opening Of· the next.a 
• 

4o Incidental t.o .the discussions of the various crypt.o systems 

consideration was given to t.he problem of the number or ditterent, sizes 

ot rot.ors which are contemplated for use in tho mechanical crn>to ayst.ema 0 

The Sub-Committee feels 'tha._ t.he 26-point rotw U7 have to be used .tor a 

long tima to come but ~hat some future agreement is.necessary~ to a 

selection among the 319 32, and 36=-point roto;rrso 

S., The Sub-Commit.tee .has the tollowina observations and conclusions 

t.o report. tl!'Om its deliberations on the tour iteme. on it.s agenda& · 

Ao Low Kchelon (Minor '.'far Vessels) Telegraphic: Systems ~ 

including combined assault. codes und tactical systems 

· f'or all m111,t.ary .Serviceso 

lo We notoe that.'the Fleet. Code and Combined Aseaul.to Codes 

are under discussion in the UK - US JCli:. 

2. We note that t.here are no ot.her Low Echelon qs~eu J9t,. 

under consideration tor Combined. use. 

3. c'le note that both US and UK have a number ot new machine 

systems under development but it. is unllkeq t.hat. aq ot these could be 

generall.¥ int.roduced in qoantit7 tor ccmbined use betore, aa1, 1953. . 

4. 'iifii conclude: 

&o .. lo machine. s19t• is likeq t.o be available tor 

general cdlMd use before, aay"' 19.53 ~ 

bo If' callbined sl"St.ems are required for any purpose in 

t.he interim period, possible devices are: . . 

.#..rip 

· Linex 

. Ouraax. 

PlaJf e.x 

Running Key Cipher 

c. ·To meet. t.he long term. re~ui.rements tor l.Ow echelon 

combined systems select10fta sho,μ.d be made W1 thin the next 12 months. . . 

Possible devices are: 

DUP l 

AFS.U(? PCH . 

AFSAN ·9 

illCM 

Concert. 

Rollick 

Bo Merchant. Ship Te.l•sr&i:fiic S7st.eru o 

lo W~ note that. Cursex is under coneiderat.ion in the US-UI 

JC.!£ ard 1e 11kel7 to be adopted as t.he 1nt.er1m solution. for Allied Merchant.. . . . 

2· 
·•· · 'f 6P S:06R&l' 

. . 

20 ;le recommend that. a machine system faster than Cursex 

should replace it, when available, and ~hat such a syst.em should be select.ad 

within the next. 12 mont,,hsQ Possible devices are: 

.. 

Ca Me~eorological Securit7 S7st.ems, Including Facsimile, 

Teleprinter and Telegrapho 

lo Ne not.e the lack of &fl7 suit.able ~ined crypto syst.em . . 

tor me~~orological pwrposeso 

20 We .note that. both the DX and US have under development new 

meteorological, systems in the tollom.ng cat.egories: 

Air-Ground 

Telegraph 

Teleprinter 

Ci tax· 

3o .We not.e that. ;1it.h the exception ot t.he A~und syat.ema 

none ot the syst.enis under developnent is lllceJ.T t.o be available tor introduction int.o general combined use before, sa.7, 19Slo 

4o We note t.hat. requirement.a and characteristics tor ccmb;l.ned 

plain text. tacidmlle equipments have not. yet been agreed upono 

So We conclude 1 

&o Ro machine crypto system tcr met;eorologic&l. purposes la 

likel.J to be available tor gener3l ·canbined use before, say, 1953 .. 

bo It combined systems are required tor mat.eoroloeical 

purposes in t;he int.er.l.m. period, possible devices are: 

(1) Air-Ground· - ASAD l 

Ot.matco 

Alametco 

(2) Telegraph - CC»A (modified for weather enc1pherment) 

(3) Teleprinter - ASAU 2-1 (to be described under Item E) 

(4) Facsimile - None available 

Co 'l'o meet. the long tsrm requirements tor enciphernaent ot 

meteorological $.ta ·select.ion should ba made within the next. 12 months., ' . 

Po~aible devices are: 

(1) AJ.r-Ground • ASAD l · Otdnetco 

Alamet.co. 

An7 available ciphony syst• 
• 

_,, . 

'feP StSSiSP . 

. (2) Telegraph ... B::M 7 with provision for weather encipherment 

AFSAM 7 . PCM 

·Singlet 

Pendr.agon 

DUP 1 - designed ro~ weather enc1pherment. 

(3) Teleprinter - AFSAM· 9 

ASAM 2-1 

Concert 

Rollick 

JlercU!"J' 

(4) Citax - ASAX 2 

NRL FAX 

MET FAX 

NOT.E: Selection in t.hts cat.eg017 may not be possible unliil an 

agreement is reached in the UK...US JCEC on t.he requirement.a and dlara.cteristice 

tor plain t.ext tacsimU1;1 equipnents and associated transmission syat.ems tor 

meteorological useo 

-D<> Voice· Security Systems tor Tactical Purposeso. 

lo We note that there a.re no ciphoey systems under consideration 

tor caabined use 0 

2a tVe .note t.hat beth. t.he UK and the US have a number ot· new 

systems under developnent but. it ia unlikely that any of these could be 

generally introduced in quantity tor canbined use before, sa7~ 1953a 

lo We conclude: 

ao lo ciphony syst.em is llkel7 to be available for general 

combined use betore• S:J.79 1953" 

b0 There are no possibilities tor suitable devices in the 

interim per1oda 

. . 

Co To meet t.ha long term requirements tor canbined ciph0D7 

. systems selection should be made within the next. 12 :nonths. Possible devices 

are: 

(l) ASAY 4 

(2) ASAY 8. 

(3 ) Hallnlark 

(primarily designed as a low echelon ·ciph0117 

at.t.achm$~t; over circuit.a of normal ·bandwidth) 

(desig~ed primaril.7 tor aii'b0rne use; possibq 

~uitabl8 tor general low echelon . use; can be used 

with VHF transmission only and is capable ot- group 

working) 

(primarily des18n~d tor ta.chical point to point. 

circuit.a using VHF or wide-band circuits; could 

be used to provide secure point t.o p0int. telet.n>e 

and tacaim1le_transndas1~s) 

4 

'l'OP ~ 
•· 

'f OP JEeRJff 

(4) Sorcerer 

(5) A?~/TRA 16 

(6) 0 ... 70 

(primarily desiened for point to point ciphony 

over long.and short distance circuits or norm.al 

band width) 

(primarily designed for microwave poiiit t.o point 

radio relay links, carrying 8 voice channels; can 

handle teleprinter with frequency multiplex) 

.· . 

(primarily designed _tor microwa"!e point. t.o point. 

radio relay link_s 1 carrying 12 voice channels; 

qan carry facsimile or teleprinter with !requenc7 . ~ . . 

multiplex) 

60 The Sub=Committee has the following general rec~ndat.ions to make: 

ao That immediately and on a continuing basis there will be.a 

complete interchange ot the technical details or the systems d~cussed in 

these exploratory conferences., This should inclu;ie tec~ical visits 0 · · 

bo That security evaluations be ma.de and exchanged .on all items· 

discussedc. 

Co That the U.,S0 ...(J 0 Ko JC.EC be invited to consider and· resolve without 

delay t~e operational requirements in ~11 fields or Combined Cryptegraphic 

Communicationso .. 

d. That a .further conference be held 1n about nine months to arrive 

at final selections or items to be recomaiended for canbined adopt.iono 

eo That discussion and interchange of technical intormation on 

certain Qther it.ems of canbined interest, such as the security aspec~~ of IFF 

and ~uthenticat.ion systems, be authorizedo 

5 

·'.COP S~Ra · 
, 

1. All ~ in ....... ~ ot 8Doiee4."'8 ... t!lda 

hbwe•:*9 waa wWl!llll4 ca a5 ~ 1950 to 41Cm1194sr t1D mMlllP d 

-~ ~ p3.llll maaN1e pi.~~~ ~s 

--tbs~ ICl'l lllPIViO ~. 

Zo Sabo@lnl."89 A bu ala• 111..,,,,clad tbat tllla ~ CCII 1rl 

np1s.oat 1bJ' t!Jre ~ Bal lll'IP'o pdmd.pls mt. ~ trim 1 Jamnr.r 1955• 

Jo !Ida ~ls•--' am be ~ TIPJ' 1in'llL llldl.GlllB _. wBbl1BI llddSlm& eqld.p:lmt ad/or _. bd&nclmd.Da llDlf1 <ICl,llf.~ 

4o a'1a tiba ~ d tbe DBW ICDI -.rpl!o prlnolpla, tlae .foUad'W . opaa'14D1tllOllltlee17111 bra aftllafdias 

(a) fedll oma\8':lllc el~ ot 26 Jnten pl.• llpl08 bD -"' S.. 

oliadlng 1111m8N18• •a 4~w1"1 ot 'll.O lllElllsl8 pla am 

adAtlGIBl!l ~ pl.& &IP-* ... -' Sml111H.11c ~., liii!IQ' 

ro;a ~ Ql diiGqz»'l.m 11z11 all pdd a. 111• • "51.'lla • 

~CCI. 

('b) Rani ot '1111 addlu...al taa\LlitiM• t.- mR1P1-., a all»"NN of 

ld'8N m4 tlp:Na, oftue4 llr' a ___. !s~ ,.s.n 

llza enUalQ.e. 

'· • u.s. md .. B:rltialla 111'9 ~ 1mtl4im5 Ml1 oa-u. QJ:g;allo 

'MG1d.naa apable of 81PloJbl the .,._~ Bal pz'Jmlple mli aff'ed.1ltl -

or 1111 or ta. taolU.'tUe ~ ID~ telapal-... !be ~ 

bl' msa •• tadll.111ea w&n be ~ s.e ~ m • u.s. '-11.p 

flaa tba'b aap10'lfd in .. Blt."1alla .......... '° c1Ut-...s ilm .-1ilnc 

:Nqllf.lralmte, Ila ... ablt1l ia P8ftl!N:Plllll '1 l!Dd 8. btlotr. 

'· .. •ti.-... .,... ., • !'oUadng .-ft1 .. ~. 

U poad.ble, ls& ms 

(a) ._ and ~ ot trhs ....,. --' ab& a adard ~­

~\id.th adntBg •'lh'm•· 

(b) ~ m8' ba •"--tis ilo t1le INC'-' poealble -'-' 

Q1ld to u. J.aee' ~ <Nlbrl>la&o 

(e) Hsolwdaal mn&l mn'oanPlda d9i5!.ailD1daa !bnm ia iillae CCK 

mcl <11diG' n@hima .n ba elfatppGldo ~ ~lbWl.tr 

TOP SECRET 

I 

\ 3u.b 

Cor.m 

li. 
ad. simpler ID!dntmmce ancl ad.1m~ nauat alse 1'e 

pmy,l.de4o 

(4) lsNllbial Teleprinter t&elU.'1.es 11118' be p~ 

It is in the iDtel'p~an ot tld.s la8' ~ that "1!e U.So s.nd 

Br!U.sh 'dna U8 at Y81'1..m$oeo 

?o !he Bd.tisb Operational Staff nquire that. oft•lim ~ mio!a 

are to piavlde a'Ut.otlati.o ano,,-pM.cm. m4 ~on ab81.1 be capable at1 

(a) Accepting ~ tape, pertonte&i on au, ~elep~ emploJ'lnl 

the ~1dcml hlepi&ph .(l.phrabfi Koe a. (See page 265. 

felegrepb ·Replati.cms0 Cdl'O Rsw1a!cm ~ 19.'8) 

(b) Presenting au1;amG1oalli' in pep fOm tba decll'.n>iml wnd.oa 

1dentiNL with tbe origin&\ 'faelao ,Dlus,, tor '"8J'l>le8 all 

the telapr.bate!' 1'mcttans recpiRd le t.amldd.oa wld.ela 

appaand. f.D tbe orJ.giml. ten lllllSt be repmdwsal d.urlDg 

dsan14• 11114 be aapable ot opezra'1Dg a ~ !elep1'lDMl'o 

So fl1,e .l7.So operattanal. ~°' hu not bellD so ~ apaoUleclo 

The tel,'11 "Esaei!ti.al !~ l'aclli1d.es8 bas baa emp1oJQcl an4 la Gm"l'm~ 

iakrpzets.d. ba- the deaipen as nqdri.ns that the_.,. 11118t be oagpable 

of noeri.Dg a fta1.n Lmpap !ape pertOaW an llltl8 s1HBndm'd Telepdntar 

mcl lll18't Pl'Cdaae the d$G17Pte4 ftftd.an !n. Ill! 1bnl. !o pmrida thaBe 

.f&Ci.11\ies the UoSo deaipe:nu 

(a) Use s>1111 bit not all o~ tlaa upper case ~. (1'a11Nre 

aad a'lant.-lmk are •al) 

(b) lm-' ·

11Ca1TJ.age Retuln8 and RLiJle J'eaclC d11ri.ng ~ 

.cmli' at the and ot each limo . !Ima tile Cld.gl.Da91'" s 

_talml•t.tcm ol'Dllot be repadUeed. . 

(o) Raplaoe tba lett..a •z11 and· 11Jll t.n \h8 deal7PW WN1cm 

. . w.ltb nxa and "!", :respeaU.'ftl¥. <•~£·· ~one.,• "Itlro:." 

. "X&mlal71" ·~·It) 

9o ~ 20 October a -*ing. pa1"1\'r ot Subcomml.ttee A wld.te4 tJae 

'fei.etne Corporation to inapen and dl.8eus the 11.So llPCIF m t.bst hope 

tlurt acme means· lldgJ1' be ~eel wbeniby tbe U.So alpher mab2ne llPCJlll 

plus "118 mP 5000 (Autmaata.o ott-Lf.l:le :Eq1dpmnt.) and 1&be Bri.Uala cdplm 

2 

TOP SECRET 
11> 

\· 
.. I .. 

... I 

e -REF I~:A67163 

TOP SECRET 

(e) '.rhat interch~go of vims,. in particular, on reecmmenc!ations 

(b)_, (c).,and (d) above, be continued. 

'· a. 'l'o B1mrol mum ~, Brit:i.ah Delegation 

4 

TOP SECRET 
A ' ' ... 

. BRUSA COMSEC CONFJ!:hENCE 

Third ~aport of Jubconmtittee A 

24 October 1950 

lo As recorded in the second report ot Subcamnlttet A. this 

Subcommittee waa reconv6ned on 23 October 1950 to consider the 

matter or enorJPting letters plus numeral• plua certain other 

'Dllepr1nter character•• using the .,_rotor BCll Cl'JPtO taohn1que. 

2. Subcommittee A haa alread7 recolllD'iended that the present 

CCM be replaced bJ the 7-rotor BCM crJPtO principle not later 

than 1 Januar7 1955. 

3o This replacement can be effected b7 bo'h nationa bJ 

mod1fJ:lng ex1at1~g equipment and/"Or b7 intrcduolng new equipaento I 

4o With the 1ntroc!uc t1on ot the new BCll crJ'PtO pr1ncf ple, the 

tollow1ng operating tac1lit1e• will be available: μ~ ~~ 

(a) Text• consisting either or 26 letters plu• spaoe..)\orJ 

(b) 

alternat1vel71_ot 10 numerala plua one additional ~14.-\1'~ ~ 

•Jllbo~p~~e~ b9 enal-JPt.ed. On decr:rpU1111 

"Z" 1111111\;: as "X" as w1 th the present CCMo ~ ~ 

Hone ot tbtt addl tional tac1il°t'f::frr:t.~ ~ ~b<\ 

standard Teleprinter will be availableo 

5o The Uo So and tht britlah ar~ currentl7 building new 

ott-11ne a1J)her machines capable ot emploJins the 7-rotor OOK 

principle and ottering some or all of the fac11ltias inherent !n 

etandard Teleprlntera. 1'he technique by whj ch these f'ac111 t1ea 

will be provided 1s d1tterent in the u.s, design from that 

emplo7ed in the Brlt1~:.1~~•lc ~*i;:; 

thew opa~at11ig r&qttlrauenta aa ftel&aed bJ eaub nation dittero 

wt•!IJll~oth nations are 611r gsaau lilti; agreed that the 

fol owing~requiremente)it posa1bl8)be met: 

(a) Size and •eight af the =must show a marked 

reduction compared with f\ machines o 

(b) EncrJPtlon must be autanatlo to the greatest possible 

extent and to the lowest possible aohelono 

(c) Mechanical and orJPtographia det!clenclea found in the 

CCM and earlier machines must be elim1natedo Greater 

rellabilltJ and simpler maintenance and adjustment 

must also be provided 9 

(d) Eaaantlal Teleprinter rac111tles must be prcwldeda 

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It is ln the interpretation of this last requirement that the 

u. s. and British views are at varianceo 

7. The Britiab Operatjonal Starr require that ort-line 

machines wbioh are to provide autcmat1o enorJPtion and deor1pt1on 

shall be capable ot: 

(a) 

(b) 

Accepting a tape, pe1torated on an7 Teleprinter 

1... 

emplo71ng the International Alphabet lo. 2. 

Pl'eaantins aut; .... Hoall7 in p- t'orm the deorJP;_~j ~~ version identical with the original text. (Thu(,..~'b.J.1 

the Teleprinter tunctjona required tor~ , 

tabulation which appeared in the or!ginal text must 

be reproduced ~deCrJPtion a~d be capable ot 

operating a standard Teleprin,er.) n~,~ 

~~The u. s. operational requirement ha• not been •o~~\ 

~~ The term "Essential Teleprinter Fucilitiean baa been 

(c) 

~Jri•IB:A&ilu~'l'hua 

~not~ ' 

the originator•a tabula~ion 

Replace the letters "Z" and "J" in the decrJPtad 

version with "X'' anCI 11'Y11 , reapectivelJ'. (eog., 

"Xone"" ''Xero"" "Ya11uar7", 11 Adyuat".) 

9. On 20 October a working party or Subammaittee A vieltef! 

t~e Teletype Corporation to 1napeot and disouas th~:~·ii.•~ . ' I in.t.lie-·bope.,that some means might be devised whereby the u. So ... 

11 PCll"' p~SP 6000 (Automatic Ott-Line Equipment) and the 

B~ "P.ls."NDRAOOB" or "SINGLET" could interwork, while at!ll 

being c~ble ot work1ns with ex1eti~na• ot the nation 

concerned and alao providing the tacJ11t1ea required b7 that nationo 

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10. We have further considered the matter or Teleprinter 

raoilitiea and make the following recommendations: 

(a) 

¢ 

R ee A,,name 

prinoip a of the 

tiona" 

or Subconmlttee A be made 

ava1lab1e to the UX/US JC.EC with the request thati, 

as a matter ot urgenc7, dS.aouaaion be opened on f\ IJ'_ I 

~ • ~.)~ "f>''O(' CA4.L- ~OJ>.4te)"f~ whatVTelepJ'interA1"•c1~1tiea should be provtded ln 

new ort-11ne Combined CJPher machines which permlt; 

automatic enor71>tion aria decr:n>t1on in page tOl'mo 

That the Brit1•h, aa a matter ot urgeno7, p:ive 

cona1derat1on to the u. s. proposal that B1gramm1ng 

and tunct1ona1 aignala tor British machines emploJing 

th~ 7-rotor BCM crypto technique should be achieved 

by the use ot the following primary characters: 

Pr1mar7 

' To Be Character Punctjon Linlced to 

g BiRram D 

J Figure Shitt y 

v Letter Shift (Bothing) 

z Space x 

C/R Carriage Return c 

L/P Line Peed G 

That the u. s. consider the 

possibility ot providing tull Teleprinter tac111tles 

in tuture machJnaa emploJin~ the 7-rotor BCM crJPf;o 

teahnique. by utilizing the Bigram function inoludeei 

~ i0C9 design of the Br1tleh "PEBDRAGON". 

<fl j8im• ~ovldon be• been made in tbe Brlti•b "PSllDRAGOB" 

tor "~~ Fe,d" .and "Carriaga Return" signals to be 

\,I._ \ l \ 

generated where required b7 suitable counting . mechan1ama, the Br1t1ah should g1ve oona1derat1on 

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.. REF ID:A67163 

.. 

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to aba:ndoning B1gramm1nq and accepting the loss 

ot' two lower c.ase oha:ractera (J ano Z) and three 

upper cuse oharaotera (upper case J, upper case z, 

and upper case V) aa ia at present contemplated in 

~ u. a. dea1p. 

y-'> 'l'hat interchange ....e!: vi~, Sn p:(tlcular, on 

recommendatjona ~ ~, and Ji'?' above, be 

continued,,.~ ezlaNmg=-elaa11a"ld;a;o 

T. R • W • BUR TOI llJ.ILLlm 

Chairman, Bri,ieh Delegation 

4 

{.!~ Captain, u.s.w. 

Chairman, u.s. Delegation 

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BRUSA COMSEC CONFEREtr;E 

Second Report of Subcommittee A 

10 October 1950 

le As directed, Subcommittee A va.s·reconvened and met on Monda;r, 9 October, 

and Tuesdq, 10 October 1950, at which time. the following recommendations to 

be forwarded to the Executive Committee for approval were unanimousq adopted 

b;r the Subcommittee: 

a. Encmtion o£ Literal ~exts 

This aspect has already been covered in the first report of 

Subcommittee A. 

bo Encuptw o.f'_lwnerals 1- lus "X" or "Slash" 

On the assumption that thara is a Combined requirement tor the 

encryption on the agreed Combined cryptosystem of texts consisting or the 

nwnerale plus "X" or 11Slash," we recommend that ·the necessacy facility shall be 

provided as sooD as it is available, where required. 

c~ Encmtion of Letters, Plus Nwnarala-1 Plus Certain other 

Teleprinter Characters 

It is- apparent that the U.S. and the British have been called OD 

to meet ditterir.:c:s 'operational requirementse This has resulted in .the deeign 

authoriti~s or·the two.countries proceeding along different lines of development. 

A possible compromise between these conflicting developments has recently been 

put for¥.ard .from the U. s. side and a working party consisting of: 

u.s, 

Captain" L. F. Safford, USN 

Commander D. ~- Seiler, USN 

Commander G. W. Linn, USN 

British 

Lt. ColoneTc:A. Henn...ColliDs· 

Mr. E. H. Jolley 

has been appointed to investigate tha proposal. On Friday, October 2oth, 

Captain Safford will escort the British member·s of the working party on a 

visit to the Teletype Corporation where the PCM. {CSP 4700) and the new Off'~Line 

.Automatic Equipment (CSP 5000) which materially atf"ect this aspect are under 

development. The working party will resume discussions on MondS¥, 23 October, 

and report in due course to subcommittee A·o 

<l.1r!Lr~-- . '· ~ ,. T. R.. W. BURrON MILlER 

Chairman, British Delegation Captain, U .s. No 

Chairman, U.S. Delegation 

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:!: 

BRUSA COM3EC CONFERENCE • 

Fi.re·t Repcrt of Subconmrl.ttee A 21 

(As modifietd by the Combined Executive Committee o:a 27 September 19?0) 

26 Sepwmber 1950 

· l. Subcommi tttte A haa held five meetings to date, viz., morn111g ud 

a:ftornoon of 22 September, morniDS of 23 SeptE,mber, afte:rno~a of' 25 September, 

ad afternoon of 26 September. 

2. Mambereb:ip of the Subcommittee: 

British Members 

Mr. T. R. W. Burton Miller, Head crf Mission 

Captain, the Earl Cairns, R. N. 

Mr. Kenneth Perrin 

.Mr. J.M. G. Pollard 

Lt. Colonel c. A. Benn-Collins 

Mr. E. !I. Jolley 

U. S. Msmbers 

Captain L. F. Satford, USN, AlSA·CO.X., Chairman 

Representing JCB:C: 

Commander F. C. Concannon, USN 

Lt. Col. T. J. Trainor, t'SA (Alte:r-nate: Major JD R. Carpenter, US.A) 

Major J. M. Anderson, Jr.,USAF (Alte~te: Maj .. R. W. Larson, USAF) 

Representing Service Cr,yptologia Agencies: 

Mr. Richard Batte7, ASA {Alternate: Mr. Warren Beck) 

Cdr. F. C.. Concannon, USN, Op-202 (Alternate : Cdr.. G. W. Linn, USN) 

Major Ph-1111p Evans, USAF, AFSS (Alternate: Maj .. G. Eo Parr, USAF) 

ReJJX'eaenting All'SA: 

Commander Do W. Se 1ler, USN 1 AJ'SA-or.. 

Dr. A. S1nkoT, AFSA-o4 {Alternate: Mr'. R. Ji. Shaw) 

Colonal R. C. Sears, US.AF, AJ'SA-03 (Alternate: Mr. Leo Rosen) 

Mr. Mark Rhoads, AFSA-111-, (Memb•!lr and Bffcorder) 

3. The first maeting was attended b7 the following parsons in addition 

to the regular members : 

.Admiral Earl E. Stone, USN . 

:Brigadier John H. Tiltman, British SLO 

Colonel S. P_ Colline, AFSA-OOA . Captain R. o. Hansen,. AFSA-o4 

Mr.· W.. F • Friedman, AFSA-OOT 

Commender J. B. G. Trec'1nan, British ~rSM 

Lt. Col. Ruaeell :e:. Borton, AFSA-12A, Recorder 

4. The fi"ret. meetiDS wae devoted to an outline of the scope of tJle subjects 

to be covered by Subcommittee A, viz., the replacement of the CCM b:y the U. s. 

7-rotor BCM and/or tl:ls U.So PCM, c0rta1n auxilial'7 automat1e equipmsnt, 

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• REF ID:A67163 • 

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improvements in rotor design, and ~curity improvemnte of present CCM 

as proposed b7 tbe U.S. JCS in 2074/2 dated 27 December 1949. The 7-rotor 

:aCM (CSP 4800) was exhibited ancl demonstrated at this meetins. 

5. At the second meeting the .British outlimd tbeir general problem. 

'l"'.aey are w1lli\'38 to accept tbs 7-rotor BCM crJPtographic pr1nc1ple, and 

·discuseione ensued aa to how its adoption would fit in vith present and long 

l'"a.D89 plane. .Aleo discussed vae ~ow and wbat automatic teleprinter equipm&nt could be used with tlJe 7-rotor BCM, and hov tbe small version called 

the PCM fitted into the picstUG. 

6. The third meet1ns on Saturdlcy morniDg., 23 September, imluded 

exhibition and operation (where practicable) of: 

a. CSP 5100 Rlader working with 7-rotor BCM (CSP .tgSoo). 

b. CSP 1700 (modified b;r subat1tut1I>a DG-308 translator 

tor ENll-lo8 printsr) working with tlJe AD/GGA-1 Of1'-11m Efauipnant .. 

c. Ih-~ving of the CSP 5000 (mall otf-lim Equipment). 

4. PCM (Mock ... up, photographs and stepping diagram ;&cmmatio 

- diagraDl not availabl!/ ) 0 

· e. !CM :!:ind 13CM rotora, with enmples of int.erche.rl88able notch 

patterns and bobbin wirina. 

7. Tm fourth maeting was held on ftbndq afternoon a1'ter the :British 

had had an opPortunit7 to discuss the u. s. exhibits among themselves.. After 

som1 diaouaeion tbe follow!~ reoomrmmdat10DB to be fo1"Warded to the Executive 

Committee for approval vere UDaDimoualy adopted b7 the Subcommittee: 

a. Tlae :Bri t1sh will accept tbs OI7Ptoaraph1c pr1no1ples of the 

7-rotor BCM as a replacemen~ tor the CCM in oombimd commun1oat1ona. 

b. Except b7 :mutual asreeant, disclosure of th& 7-rotor BCM p.r1nc1ple 

will be limitecl to tbs U.S. and to the British Co11111WJnwalth. The British agree . . 

to notif7 the u .. S. authorities vhen &1J1 1aell8 of a combined ·7 .. rotor BCM s7atem 

is made to a nation of the British Conm:>nwealth. 

c. The target date for full implementation of the 7 .. rotor ECM ia 

set as l JanU&ey 1955 or eoomr if' ciraumstanoes permit. Limited 1ntrodl10tion, 

where a amall nmaber at machines would be izrrrolwd, should be implemented at 

the earliest practicable date. 

2 

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! . 

- Q pRFf:F .-IA :Jl§TI 63 .- _. JLL:l<t I . · 

d. Rotors on both U.S. and Br1t1ah ftraions of tb8 7-rotor :SOM 

to be pb;rsical'-7 and orn>tographically intercbaDg!Sable. Thie means that 

the British will change to the size now ueed 1n CSP 1700. All data, 

:ma.nufacturins, and wiring details to be furnished to th6 British tor this 

purpose. 

e. The British end '.U.S. will make im18pendent eecuriv etudies 

on tha 7-roto:r BCM, includins the following items: 

(l) Possible olumgea 111 stepping order. 

(2) Notch patterns fer eteppins control. 

(3) TJpe of rot.ox- wiring ( inte1"Yal, random, or compoe1 te). 

(l~) Preparation ot &1 liateo 

(5) Indicator proceduro. 

(6) Rltatrictions on operational use ot machine for security 

reaeons .. · 

('i') And similar technical matt.era. 

Upon complet'ion of these studies the U .s. and tls U .R. will exchs.J.lge technical 

papers through eatablish&d cbanmls. If necea&ar7 1 a special meeting to 

reconcile div1n•gent 'Views mq be held in London (or Waehillgton) at so• later 

date. 

t. The British and U. S. will prepa:r19 and exchange separate papers 

for purpose of reach1ns agreements on operatill8 instructions, mintenance 

1nstruotio:aa, cl7Pto-secur1tJ' precautions, and other procedural matters. 

g. Models (vban available ):i d.raV1DSe, apecifica.tions, and 

operat:1ng 1Datl"Uct1ons (vhere neces88.l7) ot tm follovi:as equipments will 

'be :madtt aTa1lable to the British: 

BOM (CSP 11800) 

PCM (CSP i.100) and PCM tJpe rotor 

Tape Reader (Al'SAM 12 01• CSP 5100) 

CHP 5000 ott -line automa.tio equipmant 

DG-3o8 Translator for BCM (CSP '4800) 

Rotor refi:aemnt11 tor Mark I (3•). Mark II (3 1/2"), and ,. 

Mark III (2 1/2") rotors 

AD/GGA-1 (Instructions onl.J) 

3 

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• ~F rIR;A§.7163. __ Qp .JC:C:KC I 

h. Malm available to the British the tools and dies for Mark I 

rotors &'or old T;ypex adapters)~ 

i. Msk.e available to the British the tools and drawings of old 

T;fpex adapter, mw deeign of !l)'pex adapter rotors with tires, and parteand 

drawings for new T;ypex acJa.pter. 

~ Tm tollaw1Dg NCOlllm8Dc1a.tions were agreed upon regardi:ns improTement 

of eecurit7 of J>l"S&ent CCM until superseeaion date l Januar.y 1955 as proposed 

'by the U.S. JCS in 2074/2 dated 27 Dacembor 1949: 

a. BoDOsforth theN will be iaaued 20 rotors to the· set for 

each CCM in lieu ':Jt present number of 10. i'h1s will bsooma effective 

with ~e mxt issue of new rotors. Xe;r lists will be eo prepared that no 

rotor will ever be effectiw on two successive da;rs, within the Salm key 

l1ste for each or~n>toohalmel, so ae to permit setting up two baskets for 

two euccees1ve da.J's from a sina].e set of 20 rotors thus obviating the med 

for duplicate sets of rotors.. Thie will result in no substantial increase 

in the number. of rotors to be fabricated under present plane. 

b o R&movable tires will be introd1..tced as soon as practicable after 

suitable rotors become available. 

c.o Metters such as the rate of superaesaion and apeoi:fic times 

o:t superssasioxi are to be lett to the established agencies charged with 

such matters .. 

9. The U. S~ will prepare ar1t1o1em of the British machines,, nPendragon" 

and "Si»slet." 

10. Subcommittee A will reconvene after Subcommittee B hae completed 

ite deiiberatione. It is hoped that f'urtJwr agreement 1llaJ' then be reached 

?9f38J"di118 the lons-rarige provision of facilities for automatic oparat1ons» 

usins of1'-l1D8 combined cipher equi:p191nt. 

13=.. The :tilth meting we.a called for committee approval of the wordiJ>S 

of the foregoing items .. 

~ fr/L~,,.,, T. Ro W o .BORTON MIL.Um 

Cha1..."'DIB.n1 Bri tieh Delegation 

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BRUSA CCllSJ!D CONFERElEE 

~ ~ ~ Subc0111111ittee A 

-· { 

26 September 1950 

1. Subcomittee A has held t1Te meetings to data, viz., morning and 

afternoon of 22 September, morning ot 23 September, att.ernoon of 2; 

September, and afternoon ot 26 September., 

2. Membership ot the SU.bcomnittea: 

British Members 

Air. T. R. I. Burton Miller, Hee.d ot Mission 

Captain, the Earl Cairns, ft.Na 

Mr. Kenneth Perrin 

Yr. J. JI. G. Pollard 

Lt. Colonel C. A. Henn-Collins 

llr. E. H. JollBT 

U. s. Members 

Captain L. 'I'. Sattord, USN, AFSA-OOX, Chairman 

Repreaentin1 JCEC: 

Commander 'I'. c. Concannon, USN 

Lt. Col. '?. J. Trainor, USA (Alternate: Major J.R. Carpenter, USA) 

llajor J. M. Anderson, Jra,USAP' (Alternate: Maj. R.W. !arson, USAF) 

Representing Senice C17Ptologic Agencies: 

llr. Richard Batt97, ASA (Alternate: llr. Warren Beck) 

Cdr. F. C. Concannon, USR, Op-202 (Alternate: Cdr. G. W. Linn, USN) 

Major Phillip Evans, US.AF, APSS (Alternate: Maj. G.B. Parr, USAF) 

Representing AJSA: 

Comander D. 'la Seiler, USN, .AFSA ... 04 

Dr. A. Sinkov, AFSA-04 (Alternate: Ur. R. H. Shaw) 

Colonel R. C. Seara, USA'I', .PFSA-03 (Alternate: Hr. Lep Rosen) 

Ur. Mark Rhoads, AFSA-14 (Member and Recorder) 

)o The ti:rat meeting •a attended 'b7 the following persona in addition 

to the regular members& 

.. 

Admiral Earl E. Stone, USN 

Brigadier John H. Tiltman, British SLO 

Colonel s. P. Collins, Al'SA-OOA 

Captain B. o. Hansen, AFSA.0 04 

Yr. I. F. Friedman, Al'SA·OO'l 

Comander J .R.G .. Trechman, British JSll 

Lt. Col. Russell H. Hort-. AFSA ... l2A Recorder 

4. The first meeting •a devoted to an outline of the ECope ot the subjects 

to ba covered bJ' subcommittee A, viz., the replacement of the CCM b7 the u.s. 

7-rotor IE.II and/or the U.S. PCU, certain auxiliary' automatic equipment, 

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-· I 

improv•enta in rotor design, and aecurity 1mprovementa ot present CCI 

a.a proposed 'b7 the u.s. JCS in 2074/2 dated 27 December 1949. The 7 ... rotor 

BCM (CSP 4800) •a exhibited and damonatratad at this maatingo 

5., At the second Mating the British outlined their general problao 

They are willing to accept the 7-rotor BOii c17l>tographic pr1nc1ple, ancl 

discussions ensued aa to how !ta adoption would tit in with present and long 

range plans. Also discussed aa how and what automatic teleprinter equip... 

ment cOllld be used with the 7-rotor BCI, and how the small version called 

the PCM fitted into the picture., 

6. The third meeting on Saturd81' morning, 23 September, included 

exhibition and operation (where practicable) of1 

,< ... ~~·\"If 

a. CSP 5100 Reader working with 7-rotor BCM (CSP 4800) .. 

b.. CSP 1700 (modified bJ' substituting ENG-)IJS tra'lslator 

tor E.NQ..108 printer) workin! nth the AN/GQA .. l ot't•line Equipment. 

c. Drawing ot the CSP 5000 (small Ott-line l"iuipment) • 

• d.. PCll (Mock-up, photographs and stepping diagram fschematic 

dia.gram not ava1'JAbli7• 

e. PCM and BCll rotors, with exampl&s o£ interchangeable notch 

patterns and bobbin wiringo 

7. The tourth meeting waa held on Yonda;r atta~noon after the British 

had had an opportunit7 to discuss the U. s. exhibits among tnemaalvea. Attar 

~.wau~ some discussion the following •••••Me to be f'orwarded to the Executive 

C01111ittee tor approval wre unanimouaq adopted bT the dllbOmmittee& 

a. The Bri ti ah will accept the cryptographic principles ot the 

?•rotor !Ell as a replacement tor the CCII in combined oommunications. ~ 

h. -pt by ~z.-t~fJA.~ 1~~ wW be llaited to the U.S. imd•Bl'itiab C-.-J.th. Tbe agreoJ ~a....~1~μ+o-,-ra~ · 1

" 

to notii)' the u.s. authorities when U1' issue is Md.a to a ot the 

British Commomrealth. " ~ 

Co The target data tor tull implementation ot the 7-rotor Blll 

is sat aa 1 J8J1UU7 1955 or sooner if circmstancea permit. Limited 

introduction, where a small number ot machines a>uld be involved, should 

be implemented at the earliest practicable date., 

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" 
... 

\ 

• ) 

d. Rotors on both u.s. and British Yereiona of the 7-rotor 

BCJI to be p1J.rsica113 and crntographical.q interchangeable. This means 

that the British w1ll change to the sise now used in CSP 1700. All data, 

manufacturing, and wiring details to be tarniahad to tbe British tor this 

purpose. 

e. The British and U.S. will mke independent security studies 

on the 7-rotor S:M, including the .following items: 

(1) Possible changes in stepping order. 

(2) Notch patterns tor stepping control. 

(3) fype of rotor wiring (interval, random, or composite). 

(4) Preparation of ke,r lists. 

(5) Indicatw prooedul'a. 

(6) Rest:riotianaa.. on operational use of ucbine tor security 

t' ' aill•ss 

'"""' 

liJI 1JuSa/8'.I. 

" II. 

11• 

' ~ It necesBBrT, ' 

a special 

l-o meet1n~ • ~·"' ~ 

- A , 7\- -~ 

held in London (or Washington) at aaae later dat~o.::;1 _ I ':t• a8'1aas::t ) 

~ ' :;:;..._ ~' /e ..wyn r o • &;:, ... :.QR fQ.e -- OB(.i) . • ~ ~ ~-

.t. The British and u.s. will prepare and exchange separate papers 

for pgrpoaaJ of reaching Jiii agreeman15on operating instructions, mintenance 

instructions, c17pto-aecurit7 precautions, and other procedural matters. 

I• llodela (when available), drawinge, apac1t1cationa, and 

operating instructions (where necessary) of the f'ollo•ing equipments will ~~Ao.._ 

be pmrerr to the Br1 t1sh1 

t\ 

BCM (CSP 4800) 

fCM (CSf 4700) and PCll type rotor 

Tape Reader (AFSAll 12 or CSP 5100) 

CSF 5000 Ott-line -auto-.tic equipment 

D0-308 Translator f'or S:ll (CSP 4800) 

Rotor re.tinemanta for lark I (3•), lark II (J 1/211 ), and 

llark III (2 1/2•) rotor• 

Al/QOAco~'tioS~RET 

.3 
... 

~ 

,... . Y' IY.~ll Ii~ 

· ho Mak~fefin!t i 1 e11a!. ····~ to British.~ ~ tools and dies for 

·-j \ "' 

Marklrotors(ft.~~~ ~ . 

1. Make :ktdd'inUa la• enWli"• to British ~tools and draw-= '" ..... " ings of old TypeX adapter, new design of TypeX adapter rotors with tires, 

and parts and drawings for new T1peX adaptero 

So The .following ~~~.J.~ "'91'BUUU¢._e ~me-de regardihg improvement of· security 

of prssent CCM until supersession date 1 January 1955 as propose4 by the 

U.S. JCS in 2074/2 dated 27 December 1949: 

a. Hencefort~ there will be issued 20 rotors to the set for 

each CCM in lieu or present number of 10. This will become effective 

with the next issue of new rotorso Key lists will be so prepared that no 

rotor will over be effective on two successive d81's, within the same key 

lists for each cryptochannel, so as to permit se~ting up two baskete for 

two successive days trom a single set or 20 rotors thua abviati."lg the need 

for duplicate sets of rotorso Thia will reSult in no substantial increase 

in the· number ot rotors to be rabricated under present planso 

_bo RemoYable tires will be introduced as soon as practicable after 

suitable rotors become availableo 

. co Mattera such as the rate or superseasion and specific times · 

of aupersession are to be lett to·~,.:-~·;~ JCEC 

charged with such matterso 

9. The U.. So rill prepare criticism of the British machines, 11Pendra.gon" 

and "Singlet." 

lOo Subcommittee ~ will reaonveno af'ter Subeoilllllittee B ~.as completed 

its deliberationso It is hoped that further agr~em~nt· M8\f then be reached 

regarding the long=re.r~ .proviaicm cf .fa-gilitierr fer automatfo opera.tior1s, . . :" . •. . 

using off =line combined cipher equipmento 

11,, Tbs f.iftb meeting was called f'or crumnittee appro-:;al of the wording 

of the foregoing itemso 

~~,a~ I . ~,. 

T. Rn Wo BUR!'OR 1'11LLER 

Chairman, British Delegation 

TOP. S)\CRET 

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