.......,. =----~~- ---~-- - - - -

e riefP _1S~e~e.r e ....... 

~~TO 'DiE. BRITISH CHiiFS,OF·SlAfF AND 'lHE US CHIEFS QF STApt . . 

Qf..J!E Ul@s COiaam~1'IOMS .Si:CUigT! EXPIDRATOR.t CO!FERENCJ 

~D AT WASmGTQI, p.c. -9<B1Eigpp 2i SEP~ 1$0 

· ·l. Aa agreed b.r the· Britieh'&rxl the u.s.· Chief's. of ·stat1':1 a Ul/DS 

conference tor the reo1p~ e:ohange. ot ~ptd.c· !Jito•tJ.an •a 

opened in ~ehS.Dgton on ai ·Se~ i950;· and conatdel'fPd. ti. toUowf.ng . . . . . ~ . . . . . . . 

sub3ects: 

.a•. Low Ji:eheJ.on (ineludiug ~ ar Veeaele) Telegapid.c; ~ 

including combined Assault coma am tactical vstems for au. mlU.tal'I' 

purposes. 0 

.2• Kerchaat Ships Telegraphic 51etemSo 

c. lleteorolog!cal security $'stems, including FaCs5adle1 Telepr.lnter - .. 

and Telegr~ph. 

4• V~ce Sec:uriqr aJ'Bt8ib8 tor TaCb.ical Purpoaes. 

!• Teleprinter 07stems tor the uc~ ·ot Commufiicat.~n InteWgence 

material.. 

. . 

2. Summaries ot the p~~- of the Jn.tinge wld.• fa1.lovJecl have 

been prepa.rfJd and these are h~d both .. the ~. ~ 101'Ce8 secari.ty 

AgelJ.C1', waab5.Dgton, and the ~creta.1.7, Qrphfao Poliq Bom'd, Landmlo Dd.e . . . . . 

. conterence .bu been ()f unqueeitoned value not oDli' !n the .tleld ot Combined 

. . 

Communications Security but. also in the tield of tJ.s. Intra• aid Brit.ieh 

Int.ra-corammi1cations SeclJl"i ty. 

*US Refere=e: JCS 2a/4/.2 - . Z1 Dacamer 191t9. 

British Reference: COS(W)831·.- 26 Jol.7 1950. 

TOP SECRET 

Jeclassified and approved for 

elease by NSA on 06-05-2014 

Jursuantto E .0. 13526 
eTOP~96e .____,_. . ... . . . . ·-

3. It ia reccamnew!ed: 

!• That imma<U.ate]1' and an a --~' there ba camplete 

1Dtel'change ot the tec!miCal d~ ot the SJ&tema diacueaed in tld.a 

con£erence. Thie abould include technical 'Visits. 

Jl• That there be discuss.ton amt lntex'chaiip ot technical iDtormation 

cm cert• other !tum ot combinad mtereat, a1iCh as the aecurit)r 

aspects ot m ~ utbmtication 6f'Btem81 keJ' tape generators, Bad wnpop!ng of documents. 

!• That secur.i.'V naiuat1mas n male am ~cl on all item 

discussed. . . 

-

d. '!'hat. the U.s.-u.1. JCBO ccmdder and nsolw u a maliter of . . . . 

lll'pncy the cambined operatlaMl nqalremanta !D \he. t.lelds cavwecl 

b7 this contererice and t;hosa inc.1.uc1Gcl in item 3l! above • 

.!• That then be annual cmf'enncea on these mbjecta tor .\be nm 

tour 7ears, to ~ helcl altermt.J.y 1n London and in wasbingtan, the 

f'il'st of these to tab.-e place ~ London 1n ~proximate)¥ nine moutJ;as• 

time. 

. . 

4. 1he general ~tiona in pangraph 3 abave• together 111.th the 

detailed conclusions ot the eonterence which are attaChGd as Append:ix. A · 

to this report, are submitted fO:t the approval ot the ai.Ueh Chiefs ~ 

Staff end the u.s. Chi.et.a ot statt. 

Chairman, U.K. Deligation 

PL 86-36/50 USC 3605 

· EARL B. S'DE 

Real' Adml:rall u.s. lnJ' 

Chatman, u.s •. DalagaUcm 

TOP SECRET 
• . -~. 

REF ID:A6719..ia. 

• TOP SECRET • 

APllENDIX A 

CONCLUSIONS 

Ao · Low Eohelon (including Junor \Var Vessels) Telegraphic 

Systems 1ncludinB Oo~bined Assault Codes and Taot1c~l 

Sl_stems f'or· all l.II1l!tary·Serv1ces 

( l) Mo machine aystem is likely to be available ro·r 

·general combined use bet"ore 19.54.o 

.. (2) It combined systems are· required tor EUh1 ot the 

foregoing purposes in the interim period 9 some possible 

systems are: 

Strip 

Linex 

Curs ex 

PJLaytex 

Running Key Cipher 

()) To meet the long term requirements tot low echelon 

combined systems selections should be made w1 t·hln the next 

12 month·s.o. Some poesi ble devices are: 

il'Ul' l 

aFSAM 7 

.A~,~A 9 

MCM 

Concert 

Rollick 

.3 APPENDIX A 

TOP SEC·RE'T 
• ,;. 

• .· REF ID :·A67196 

• TOP SECRET 9 

B". Merchant Ship 'l'elesrapgio s1stama 

A maohlne system ot at least equivalent security but taster than Curaex, which ls·uinder cons1derat1on, should replace . . . 

1t 9 wb.en·ava1lable, and that such a e1stem should be selected • i • 

Within the next ·12 months., Som~ possible d.V1oea are: 

"PCM" 

OOJ> l 

Al'&M 7 

MOM 

Co Meteorological Security Syste.ms 9. Inoluding Facs1m1le 9 

Teleprinter and TelegraEh 

(ll No machine or7pto e1stem tor meteorological purposes 

is.likely to be available tor general COlllbined use before 19540 

(2) It combined s1stems are required tor meteorological 

purposes in the interim period, som.e possible devices are: 

(a) Air.;.Ground - A&D l 

Otl'letco 

Alametoo 

(b") Telegraph - CCU (modified tor weather enc1pherment) Pencil and paper.system tor 

very low echelon purpcses.o. 

( o) Teleprinter - ASAM 2-1 

(d) Pacsim1le - None ~vailable 

()) To meet the long te~ requirements tor encipherment 

ot meteorological data, selec~~on should be made within the 

ne:xt 12 months o Some po.asi bl·e devices are; 

4 .. \PPENDIX .\ 

TO p s.Ec:·RET 
'> • 

• 

• r o PFs tDdR6E'=f6• 

(a) Air-Ground ~ ASAD 1 

otmetoo 

AJ.8Jaetoo 

ADI.available clpho~ -system 

(b) Telegraph - ?.rotor BOU With provision tor 

_weather eno1pherment 

AFSAM 7 

$1nglet 

Pendragon 

DUP. l ~· designed tor weather 

encipherment 

Pono11 and paper systems 

( c) 'l'eloprinter .... APB.AM 9 

AS.AM 2-1 

Concert 

Rolllak 

Mercul"J' 

( 4) C.1tax - ASAX 2 

NRL Oitax 

METFAX 

NOTE: Selection in oategor7 (d) JD8l' not be possJble until· an 

agreement is reached in the me-us lCEC on the require-. 

ments and oharaoter1st1cs tor plain text taosindle 

equipment and as.sociated transmission systems tor 

meteorological ~seo · 

' APPENDIX A 

TOP SECRET 
< ' 9! I ~ 

• 

• 

REF ·rn :A6719..§.. 

•rop· SECRET • 

D. · Voloe Security Systems tor 'l?aotloal Purposes 

(1) _No o1pboDf ay~em 1a ~lkely to be available ror 

general ooilbtned use before 19S4o 

(2) There are DO poss1b111t~ea tor suitable devices in 

the lnterl• period• 

( 3) To· meet the long term requirements tor ··comb1ne4 

•lphoDI s1stema aeleotio~ should be made w1.tbi_n. the next ~ 

_.,~thso Some .posslbl·a ci_evioes are: .. 

(a) ASAY i,. · ·. · (primarily des1gned..:.aa .a. ·1ow ecbe.lon 

(b.) ASAY 8 

c1pbony attaobment; .·.c·~ . .n be <used onlJ 

. . . 

over circuits of normal ·band width).· . . .• 

(deslgn6d pr1marlly tor· ·airborne use; 

possibly suitable tor gen•ral low . . . . 

echelon use; can be uaed ·.with VHF 

transmission only and la capable of, 

group working) 

(o) Hallmark (prlmnrily designed tor ta~tical point 

to point circuits using VHF or wideband olroulta; could be used to provide 

secure point to point ~eletype and 

faos1m1~e transmia~1ons) 

(4) Sorcerer (primarily dealgned tor point to point 

oiphoμ,y over long and short distance 

oircults ot normal band width) 

6 APPENDIX A 

TOP SECRET 
.. ' .. ";! I I· .!/J' 

• 

A ~F ID:A6719a 

., T.OP SECRET ., 

( iri) AJj/'fRA .16 (pr1mar117 43,ee1gned tor mlorowava po1nt 

to poiiit radio relay 11.nlea "'· carrying 8 

vo1oe channels; can handle teleprinter 

<t> n .. 70 

witb freqaency multiplex) 

(primaril.7 4ea1gned tor nalorowavo pc1at 

I 

to point rad.10 nla.vlinka- oarr11q 12 

vo1oo channels; can oa~ fdoelmlle or 

teleprinter wlth·tr~quenor·muJ.t1plex) 

Cpr1mur1J.7·dea1gned tor a1r-to-a1r and 

air0 ,o•ground vo1oe privacy ;Systeni w1tb 

minimum security ot 20 m1nutesa ·Will 

operate· with an.y existing UoSo ~1roratt voice transmitter or rece1vere 

on tre~uenoiea as low as 175 KOS) 

&.o Teleprinter Systems tor the ;Exchange. ·or Communication 

Intelligence Material 

(1) It there 18 to be an immediate sQbstltutlon for 

ROCDX ~ seleotlon can be made trom the toll~wing maohlnea: 

ASAM 2-1 

5 UoOoOc. 

(2) lither machine is available in sutt1oient quantity 

to meet ourrent requirements in the exchange ot intellisenoe 

•terlalo 

7 APPEllDIX A 

TOP SECRET. 

r· 

~·· . .': . 

. :: -~;.