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RE!i' ID:A6716~~ ,{.,Q 31 ~J,..­

. -T 0 P _-SEC R ET . ff!euRM fNP6fibtmf ~.. ~ ... _...,.._ 

• BUEFD&l smr FOR TIJE_ cifAJmwf, ~m CHIEFS o:t srm 

JODT CHIEFs OF stAFF llQB'tING~ ·1400·:·UoNDAY 

· 29 OCTOBER .1951 

A.GERDA . rfEll NUYBER 4 

· J.c.s. 2f114/9 

S~T: REfolll' or m U!/O~ CCIWIJMICATION s.zEuarn· . OONm.ENCE, · 1951 

.BACKGltOUND; 

···~ 

. -~ 

lo· ID the reports of ·the i95o mt/US-~cation Security ~f'erence held.in 

Vlaald,ngt.on (Bnc.loaUl'eS nA" and 8 8" to J;.C.S .. 2D74/7), recomnandation111 were .made b.V 

the Cb&innen of the U.Ko and u.s. Delegations tllat. ther•i be -annual conf'e:rencee for 

the next tour ;rears,· the conteroncoe to be held alteniatell' :in Lend.an and \Tashington. 

The rsca:rmend&tion·was approved 1:i' the UJt. and U.S. Cbiets ot Statt. 1'he report ot 

the second. cmferenoe ia aontaine~ 1n J .c.s. 2074/9. · .. · · 

CUllRENT BEPORT: 

. . 

2. Diacusions nre. continued d'1ring the conteren.ce in London on the cryptographic i~ wbich were coneide:red in the .1950 ccnterence with·-t.Sc~cal tnto:rmatJ.on .on securit7 and 8ngineering aspec1i• of commmiicat.ion security ~ttera being exchanged.be- .· tween the two delegationa. Mn ita .introduced ~or di&Qus8ion in the 19.51 conterence 

were the security aspects ot m, isecure wrapping ·or ~p•r •er.Lil,, ·and ker•t&pe · generaton •. The reccmnendations ot ~he Chairmen of the U.I:. a'nd .u.s.· Delegations .are 

set forth in detail in paragraph S ot the repc;rt (&I.closure •:. to ·3 .c.s.· 2fY14/9) .. 

3. Four .amendments to .the ;·reportt are proposed by the DJ.actor,. Armed F~r.ces·· Security. 

Agencl', tor consideration. These aMndments are ·sat ~oz.th in.Bncloaure "A" to J .. c.s. 

2071+/9. 1he amendments have received the cancurrerioe: of the·~ Forces Securit.y 

Agency Council (AFSAC)-., A copy of t:tae report and prQip089d _amandmnts -~been tor-.-

·warded to the Director, ecmm.wd.catione-Electrmica, t~r. his into:matiqn. · · . . . •. • 1, 

,1 4~ 'lbe tint amendment is to the recomendation Conta:bied ·in subparagraph (a) or ---- paragraph S ot the rePQrt. The. amendment. ia inserted tor. the purpose· of. llm1t1ng- diacu.S~10""...a ot aeyptogre.ph.'lc pri.nCiplu to those which are authorised tor discu.se!cn. 

1'h,o .. Dec1s1on _On J.c.·s. 2074/S specitical.l1' scluc:J.ed the lEM (Electric ··Cipher Macldne) 1 

cr.YJ>to~~c p~ciple tram turther CO:Usidsra~1~ tor,_ .~~d ~ommd cat.~m.is. ~s l_!· 

present~ stated~ "the reca111111mdat1ans woW.d allcllr an .iat.erpretation to ·be made .which . N 

would perid.t excbaDge ot technical. ;_nf'om.at1on on the ECY in tut~ discussions. . A 

So The:rema:ining ~ ~ts revis~. sabparagraph (e) of paralra.Ph 5 or· the 

:report to p1"0'f'ide for repreaantatiws of APSAC in~ead ot the Armed. Forces Secur:lt7 ~eJ1C7·(AJ.i'SA) •. to·meet with. British repreaentatiws·in tutμre ocmterences on oonmun1cation· ncur.tty-. · : . . . 

. 60 1be report; reoam.encls that the time tor the nm cmterence be set. . tor either . 

April or .Mq 1952,, . and iii the m-.tt mmo:ramlmu.. to the U.Jt. Cb:lets of Statf (Erlcloeure 

nA11 to J.c .. s. ZJ74/9) the ftrat wek :ln«llq 1952 ia suggested as the. ·opening mek of 

the next conference. · 

• • • I 

7. The u.K .. Chieta of Staff' have awraved the repol't without .change. . . . . 

, 8. It is ncammended that the Joint NOCllllllendati~B of the Chaii-.n ot the cOnferenco be app.rcved, subject to tile amendment• · de&cri.be4 in·· paragraphs 4 and S abo"N and 

included 1n Enclosure nAn to J .c.s. 'ZJ71+/9o . · 

.... 41KJt~,,, .. ~,L ..... . '·•· ·'Hm1Ef1.Dm~ """ .. _.Colonel, USAl" Copy tos 

OOA 03 12 

Acting Director, 'A1'ned Forces 'Seeurtj;y' Ageney ooc . . , .• 

04 .12.3 

0 11 (.:3) 06'··· 

eclassified and a NSA on 05-20-2014 ursuantto E.O. 1352