- . 

-e .. 

BROSA · COMSEC CONFERENCE· 

. o,s. 

FIRST MEETING OF TBE.PLENARY COMMITTEE 

" 

1 September 1950 

Members present:· 

Rear Admiral Earl·Eo Sto.ne 11 USN11 Chairman 

Major ·General Ho M. McClelland, US.AF · Colonel Ro· Ho Lynn 11 USAF 

Me.mbe.rs. absent: 

Colonel So Pa Collins, USA 

Captain J a No Wenger, ·USN 

Alsofsent: 

o .Wo ~ .. Friedman~ Chairman, Executive Co:rmittee 

Captain ·ao 0~ Hansen9 USN, Executive Committee 

Captain ·J., s. Harper ii USN, Executive Committee 

Colonel R~ Co Sears, USAF, Executive Committee 

Captai.Q. Lo Fo Saf:f'ord 11 USN11 Sub-Committee A 

Dr,, A .. S-':nkov, Sub-Committee B · 

Lt ... Colonel R" H .. Horton, USA~ Executive Committee 

lo .Admiral $tone opened the meeting by referring to the 

JoCoSa 207~ Series as background materi~la He explained that 

the conference had two purposes: .. 

. a~ To explore with the Br~tish a suitable replacement 

tor the Combined Cipher Machine.. The Uo So has proposed the 

seven=rotor·BCM (and the smaller PCM) as its replacement and the 

task· of the committee is to demonstrate it 11 explain·it· and 

endeavor to determine if 1 t is acceptable· to the .,Brl ti sh., - . 

· b o To- exchange cryptographic principles w1 th the Bri.tish 

on a reciprocal basis and within the limitations imposed by the 

Joint Chiefs· .. of Staff o ·He emphasized tha.t all disclosures must· 

be within these limitat1o·ns and stated that it was· essential that 

all· ·U o So personnel becom~ thoroughly. conversant ·with the, pro- visions of the J oCoSo 2074 Series., .. · . . . . , .. 

. · · 2 O' Tb.e Agenda for the opening Plenary Session on or abo.ut 

20 Septembez: 1950 .was reado (Enclosur.e 1) ·welcoming rem.arks. would 

be made by Admiral Stone and General McClellands followed by 

Mro To Ro Wo Burton Millers head of the British ~issiona General 

McClelland agreed t·o ·explain the structure and functions. of the 

JCEC in his remarkso· · 

3o Uo So Committee. structure and U .. So membership or Sub~ 

Committees and ·worki.ng Groups were rea~ and discus.sedo (Enclosure 2) · 

·4a Admiral Stone· announced that it was h1s intention to 

entertain the United Kingdom delegation ·at .a luncheon and to : 

request·. one ··of the Seri'ices to provide additional· entertainment 

as might be required ~nd as a minimum~ one cocktail partyo · 

5 O· Certain _questions regarding ~idance from the Plenary Comm.i ttee w:ere raised b'"y Mr o Friedman as a ·result. of a meeting· of the Executive. ComQlittee held that morningo .. ~he d'iscussion of· 

thes·e questio.ns was postponed ~Y Admiral StQne P who announced. th.at 

there shpuld be a meeting of a .larger group 9 to include the work= 

ing .groups 9 to di.sc\iss a·nd agree upon limitations placed upon the 

Uo s. m.emberso ~his meeting is to·. be held in. approximately one 

week9 or as soon. as the U o. So· composition of. all co.mmi ttees has 

been deter.mined., · Declassified and approved for release by NSA on.05-13-2014 pursuantto E.O. 1352a 

SECRE·r. 
. 6" A question wa:s rai~ed as to the advisability of discussing the CCM (CSP 1700) as a NATO cipher machineo Admiral Stone 

-stated that such discussions were outside the scope of the forthcoming combined conference and would not be discusseda If the 

subject is brought up by. the British9 and it cannot be tactfully dismissed, the matter is to be referred to Admiral Stone o_r 

General McClellando 

7 D At the Plena.ry Sessions verbatim minutes are to be 

recordedo Other committees will- utilize highlight notes for 

record purposes~ A summary of the work· and a final report nf the 

conference will-be preparedo 

. 80 The question of presenting the British with securitJ 

studiesv operating 1nstruct1ons 9 drawings, etca was raiseda 

Admiral Stone directed that registered documents not be made availabl~ to the British by AFSA but that 9 if necessary 9 such 

documents could possibly-be supplied by the Service Cryptologic Agency having cognizanceo ·This did· not, however 9 necessarily preclude the Uc. So committees trom providing certain dra\vings and 

other details 9 but complete public~tions would usually not be 

made availablea Careful screening of material was stressed to 

the end that complete compliance with Joint Chiefs of Starr 

intentions and instructions would be insuredo JCS 927/56 is 

pertinent 9 as well as JCS 2074 serieso 

9o Colonel Lynn comme~ted that the ~Y=S had been included 

on the list of equipments to be disclosed but that no mention of 

the ASAY-6 had been madeo He considered it essential that such 

disclosures be made since the ASAY-6 was the only ciphony equip= 

ment that would be available within the near future for use in 

higher-echelon combined·Qommunicationsa The Conmittee felt that 

the addition of this item of equipment to the already authorized 

list would require approval or AFSACo After some discussion it 

was decided to have Working Group Noo 4 give· early consideration 

as to the adv~sabil1ty ot including the ASAY=6 on the list for · disclosure and discussiono Concurrence or .AFSAC would be · requested. by vote sheet if it was decided to disclose the equip= .m.ent~ .. 

f

~.u··tL. 

/:J ~.A. 

-· ' ,~ . RUSSELL Ho HORTON 

Lta Colonel 1 , Signal Corps 

In the absence of the secretariat 

APPROVED: 

<E~~-s~ EARL Eo STONE 

Rear Admirali Uo So Navy Chairman 

2 

SECRET 
I'! .. -..:..• . • 

8EG1U£T 

U • So EBO ONLY 

AGENDA FOR 

Opening Plenary Meeting ' 

BHUSA CO:MSEC CONFERENCE 

to be held on 

20 September 19·50 

in the Lounge of the 

Navy Communioation Station, . 3801 Nebraska Avenue 9 Washington 

1.. Welcomi.rig Remarks b7 Admiral Earl Eo Stone, USN, · Director 9 Arme~ Forces Security Agency and by 

the Directori Communioationsc.·Electronicsii 

Jla.jor Gener.al Ho Mo l14cClellanda USAF ... 

2o Remarks by Mr .. To Ro Wo Bur~on Miller, Secretary of 

the Cypher Policy Board, Head of ·British 

Delegationo 

)n Designation of Chairman of Conference ... 

4... Review· of the General Agenda for the Cont'erence.o 

s~ Designation of Committees an~ Subcommittees 9 and 

indication of items of their cognizan~eo 

60 General instructions to Committees and Subcommittees ... 

7o Closing remarks by Chairman of Oont'erenceo 

Enclosure l 

SECRET 
•• 

U. So. Represe~tation and Oommittees 

for 

BRUSA COMSEC CONFERENCE 

to be.held in Washington at Hq A.FSA 

September 1950· 

Ao PLENARY COMMITTEE 

Rear Admiral Earl Eo Stone, USN, DIRAFSA9 Chairman 

lllajor General Ho Mo McCle·lland, USAF, Director, Commun1 ..... cations-Electronics 

Colonel So Po Collins 9 USA, DDA-OOA 

Captain Jo N. Wenger, USN11 DDA-OOB 

Colonel Ro Ho Lynn, USAF, DDA·OOC . Secretariat: Lieutenant Jo W". Pearson, USN, AFSA-12 

Mro Ho D~ Jones 9 AFSA~l2 

Bo EXECUTIVE COMMITTEE 

Mro W. F. Friedman9 AFSA-14 9 Chairman 

Captain Ho OD Hansen, USN; .AFSA ... 04 

Captain J. S. Harper, USN, AFSA ... OJ 

---colonel ·RD Co Sears 11 USAF, AFSA ... OJ 

Lt. Colonel Ro Ho Borton11 USA~. AFSA .... 12 (Member and Recorder) 

Secretariat: Lieutenant Jo Wa Pearson, USN, .AFSA~l2 

Mro Ho Do ~·ones,, AFSA ... 12 

C.. SUBCOMMITTEE A (FOR 00114-BCM-PCM M.A.rt·l'ERS ONLY) 

Captain Lo Po Safford, USN, AFSA-11, Chairman 

Commander F.· c. Coricannon 9 USN, JCEC (Alternate: Commander 

F o A. Go Kelly, 'USN) • . 

:Major To J. Trainor, USA, JCEC (.Alternate: Major Jo R.,, · Carpenter 9 USA) 

Major J" Mo Anderson, Jra 7 · USAF, .. J'OEC (Alternate: Major 

Ro- Eo Larson, USAF) · 

---------------' ___ , .ASA op.,..202 

, .AFSS ~C-omm __ a_n_d_e_r-=D~o~W~o-:S-eTI-ie-r-,~u~s=Nr,--=AF=SA-04 

Dro Ao Sinkov 9 AFSA ... 04 (Alternate: Mro Ro Ho "Shaw} Colonel ·ao C~ Sears, US.AF, AFSA-OJ (Alternate: Mro Leo Rosen) Mrc Mark Rhoads, AFSA~l4 

Do SUBCOMMITTEE B (FOR MACHINES AND SlSTEr-48 OTHER THAN .QCMl 

Dro A~ Sinkov, AFSA-04, Chairman 

Commander Go W., Linn:.i USN~ JCEC (A_lternate: Colll!Jlander Fo Ao Go 

Kelly p USN) . . Lto ·Colonel A. L" Burke:1 USA, JCEC {Alternate: Capt ... Ro· Ho 

Xiley 9 USA) Major Go Ea Parr 9 USAF, JCEC (Alternate: 

-----------------) .ASA 

-------~·~-----~~--' Op~202 ~--=~--.--.,----:-r~~=-=_..,.....-.~~-' AFSS Mr .. Frank Austin, AFSA-04 

Major Ro Eo Larson 9USAF) 

Dro· So Kullback11 AFSA.,..03 (Alternate: Mr. Leo Ro.sen) 

Mro Jo Ho Douglasp AFSA ... 12 (Rep.resent"ing AFSA-=14) 

Subcommittee B .. ¥1111 ha:v·e four Working Groups I) as tollov1s: 

(1) Working G~oup Noa lp for "Special purpose teleprinter 

systems for the excbange of int.elligence material:" 

Enclosure 2 

SECRET 
• REF ID:A67296 

,.; . • 

. ..... :..,-

SEeKE'l' 

SECRET . • 

l:l , 8 a EYES. O'Ni.Y. 

Commander Ao Enderlin, USN 0 AFSA-13» Chairman 

Mr.. George Ao Porter, AFSA-02 

Mro Ba Go Er1c-kson9 AFSA-03 

Mrc Frank Austin, AFSA-04 

Dr .. Jo Ao Sanford, .AFSA~l4 

I 

Uo s., to demonstrate ASAM 2=1 and discuss it under the 

various headings of appendix to Enclosure A to AFSAC 63/lo 

(2) Working Group NoQ 2 tor (a) "Low echelon {minor war 

vessels) telegraphic systems 9 " and ( b) '.'Merchant· ·sh!_i: 

telegraphic systems:'' 

(3) 

Commander Jo Co Hargreaves 0 USN 9 AFSA-04, Chairman 

Mro Ro Ho Shaw9 AFSA=04 

"Mra Jo A. Smithp AFSA=04 

Mro Richard Chiles 9 AFSA=03 

Lt.:. Commander J,, T~ Pendergrass, USNp AFSA-14 

U~ So to demonstrate or disclose the principles of the 

following machines or systems and "di'scuss them und-3r the 

various haadings of Appendix to Enclosure A to AFSAC 63/ls 

AFSA1!•7 

.MCM 

Paper and pencil systems Strip S1stems EO 3.3(h)(2) , 

PL 86-36/50 USC 3605 

Working Group No ... "1 f'or ·Cf!) "Meteorological security 

systems, including facsit.lil.le, teleprinter and telegraphp" 

(b} 11Air-grou.n.d request weather.a" and (c) "Aircraft 

movements:" 

MrQ Howard C ... Barlow, .AFSA=03, Chairman 

Major Harry Bo Blacks ten 9 USAF 9 AFSAr.~04 

Mro Robert Mo Scott, AFSA-04 

Mro Lynn Marsh 9 AFSA=03 

Mro Jam.es Ho Douglas,· AFSA-12 (Rep.resenting AFSA=l4) 

UQ So to demonstrate or disclose the principles of the 

following machines and discuss them under the various 

headings of Appendix to Enclosure A.to AFSAC 63/lg . NRL Cifax 

ASAX=2 

CSP )800A 

AFSAM•7 

AS~'A 2-l 

ASAD 1 . 

(4) Workin3 Group No"" 4 for (a) "Voice security systems for 

tactical .purposes,'' and ( b) "Air-to.,.air, air-ground communications:" 

Mro Co CQ Wright 9 AFSA=03 9 Chairman 

Lieutenant Dalton Co Ward 9 USN, AFSA~04 

Mro Ryon A,, Page, AFSA-04 

Mro Thomas Prugh~ A'FSA-03 

Lt o Command er Jo Ta Pend er grass l"I USN 9 AFSA·00 14 

U~ S~ to demonstrate or disclose the principles o~ the 

following machines or systems and discuss the~ under the 

various headings of Appendix to Enclooure A to AFSAC 6)/1~ 

y ... 9 

y ... s 

Y-4 

BuAer Low echelon,ciphony syste~ 

AFSAL 5104 

2 

Enclosure 2 

SECRET