J 

REF ID:A2435776 

2.3 Januar;r 191+? 

ltF..teO!WiDUM ron RECORD 

SUBJECT; Prellls1Dlll"J"' Meeting re Ji"o2'thco11ing Vlalt ot PIQ'll&SterCaptain 1μ.son 

1. A ... ting •• held at the Nav hpartaent this date at 

the invitation of the Chiet of llaval Communications (Adairal 

. Stoui ~or the purpo• cf be.Ting a prelillina.JT diacuaaion ot 

the impending v1a1t o.r Paymaster Caμta.1n Wilson, tn connection 

with British deairea to coordinate Ang.lo·A.~er1can future dev'elopment of crypto-aida and to improve cryptosraphic mechani•a tor 

Combined CoJUJ1unicationo. 

2. Tnoae present; 

A!!il 

1.t. Col. 'tiet£ 

Dr. Sinkov 

Dr. i~ullba.ck 

Mr. Friooman · 

J. The tollo~ing points were ag~eed upon: 

NJ.VY -

Adm.irl'll Mone 

Captain Horne 

Captain S.1.ith 

Capte.in .:>e.f.ford 

a.. Captain Smith as Chaiman of U. s. group will act aa 

apokesman for the group in meettnea with the . ritish on this aubject. 

b. Tbe . .first meeting would be confined solely to a discussion of the Cc:l. The British woul' be asked to present their 

views regarding alleged ~aaknesses and poas1'1e improvement.a. 

Declassified and approved for release by NSA on 09-19-201.3 pursuantto E .0. 1352a 

C .O .P I 

r: .--, -. 17= -=) r .-i) p....:~ = -

• • , :"' I ' •.. I • I~ ;"!;~':···I·.·...,:"'~)•·! •· :. ·.· r. ·:· -~ ;,\f .. ~ ... ~ 

~ .... · }' 

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:-_· c.. / 
ot the CC~ to increaee its •ecurit1. Captnin s~it~ would present 

A.meric:ui propofh~la for 1mprove~ents, the latter to e~priea onl.T 

the tollo~ing three f~atures; (l) uae of variable-c~~-cJntour 

ciska, (2) ch&fl688 in •t•p•·in3 cont:rol to increase lan~'!t or 

e;ycle and eli!!.!1118.to ar.ort <b-oicles, (3) incre!.s• 1n nwnher ot 

rotors l-er set,. Theee ch'.':nJ8B •ould ~~• practicable it the 

~1tis"1 she;uld agree to ali~L1e.tf) t.ht11r Tl'd::X-Adapter ~er~ and 

u.ae CSf J.700 exc..l.usi•el)r tor Ccmoln.ed Oommunieatlons. 

o. The'?'e ap~aara to be no reason to refr~tn trom discuseln_; automatic CCJ.! ec;.ilpc.ent (tape ... op.:tr4Lted C·ll !or h1;:h .. speed 

enclp~erment and deciplt•?"ment.) eh~•1 ld this point &!"iae 1n the 

course of diacueaiona regs.rd1~~ the CCM,. 

d. There will be no diseua•ion whatever aa to poaslble 

use ot EC~-SIOABA tor Co~bined Comnunication•. It the Britillh 

...... --------~~-------~~~--~~~~~ ahould preae11t. a.ey mooel er drawin;a ot a. uchln• which rea~'Ylblea 

the '.t~-SlG.A!A, no oommente would be made b7 U. 3. re~resentativee, but Captain S'.'lith aa Chairman ot U. s. ?.l'OU~ would ir.erely 

state t.hat thn 11;>:.t ter ircu1d be t~ken ruder consideration. Ho 

expreaaion or attitude on tl·'J part of aey U. s. representative 

ahoulo di~olose ho~ eloa• or far t~e British propoeal is to 

•· At thff first meetin~, U. s. r~preae·t~tivea wi~l initiate no discussion or p»apoaala regarding tbe followin~s (1) 

nn 11eeh~ni1~e for loYi-ec'.llelon uaqa; (2) cipho?>T or c1fax •<lUiP .. 

menta; (3) non-l'r.orse equlpwenta, ioclu· .. l:'lg such aa ANit'RA ... 16. - r.;;;:·,·= r· :·::· · -·· ·· ~:.., : si' 1 r1.r '' · ! ·~'-;~i 1 l.. . ·:..1 ·.•. . . • . • · .. -;;·;_ \ ;· ~ .i 

. --·· -····-·-·-···· ··-· .. ······- ·---···· ·- ·---"~··':' . ~-·· .. ~~=~-.,.- .. ,. ··-···-· .... ~""=-=····=---=-. .---.-----,.~--· --· ..... ·----~~---~~~--~·-·--- .. ·-·-
REF ID:A24"35776 

Cj Qt t 

Should the Br1t18h wiah to enter into or aake propoaa.J.a concerning 

these IJ\l~jecta 1 they will be told these •atters shou.ld be !ett 

£or arubsequent 1neetlo.is and will recu1ve conaideration at the 

pruper time. 

f. In 11rder to be prepared tor tuture d.leou•aion or 

oiphon,y equlpmente, •~ould t.ha Sr!t1&h raise thia point &a a 

tiel.d tor coor~ination, tha A.:A repreaenta.tiYea at today-'a meeting •ill requeat the C!-iet, J..SA to 1•aue dirt~t1ve1 ae to how 

tar the Arm7 me:abers •a.T iO in dimaU•lng ·t.o t.he Britlah details 

c! Arf!3 a1phO~J¥ and cUax develo.·ments, l.ncluiii~ SIG::AL! and 

Al/0~;.~2.