· AFSAC ~ 6)/1 

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Ua§a ifi8 '951.'¥ 

• 

19 July l9SO 

MEMORANDUM :!'OR THE MEMBERS OFAFSACt 

SubJect: ...... 

References: 

. . ~-, .. ~·~ · ..... '· ·:.ihci~a\ires: 

Uc. Soc\..;.. British Conterenoe on the Ex.;;hange of Cryptogr~ph1o Principles on a Reciprocal Bas~s-o \.1. . ·.I·.: ·. .,_ 

fa) JCS 2074/2. dated 27 December 1949,, 

(b) JCS 2074/) dated 16 February 19500 

(A) 

(B) 

Agenda tor UcSo - British Conference on the 

Exchange of Cryptographic Pr1nc1pleso . Schedule·ot Specific Items to be Discussed 

ln U., &,, ..... ·.British Conference on the Exchange of Cryptographio Principlesg · 

. . lo The EnQlosures" prepared in anticipation of the 

subject Conference as provided tor 1n the references 9 .are sub= 

m.itted to the members ·or ·Ai'sAC tor their considerat1ono 

21 

2~ In general 9 it is expected tnat·th• Conrerenoe . will contine its deli.berat1ons to the limitations set forth in 

Reference (a), and will oona1et o:r exploratory diacussione relative 

to tne exehange of 1ntormat1on by d1sciosuree or models and 

.designs of cryptographio equipments now under development 1n the 

categories Bet forth. in Enclosure (A) a 

)Q Enclosure (B) coin.prises a· detailed schedule of 

apecitic items to be discussed with the Britishj 

1+,.. If A.FSA.Cf approves the content of the Enclosuree., the D1rector 9 Armed Forces Security .Agency will initiate· . proceedings by submitting the Agenda contained in Enclosure (A) 

to the Appropriate British authorities tor their consideration 

and approvalo 

Copy to: 

Director, 

Communicatio.nsElectrQ!:l ics AFSAC~ 6)/l. 

!SF Sleftft 

\L · Sa ltES OBL¥ 

EARL Ee. STONE 

Rear Mmiralp Uo S,, Navy Director 11 Armed Forces Seourity Agency 

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eclassifi ed and approved for release by NSA on 05-13-2014 pursuant 

o E.O. 13526 
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... 

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& ~_g _J:p:_A§.7305a 

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AGENDA FOR Uo Sr. .:. BRITISH CONFERENCE ON THE EXCHANGE OF. 

CRlPTOGRAPHIC PRINCIPLES 

&a Spacial Purpose Teleprinter Sys.tems tor 

the Exchange. ot Intelligen.oe Material u 

-bo Low Echelon (Minor War Vessels) Telegraphic Syatemso 

Oo Merchant Ship Telegraphic Systems~ 

d~ ~eteoro~ogical Security Systemai Including· Paos1m1le 8 Teleprinter and Tele~apho 

ea. Voice Security Systems tor Taotioal 

Purpoaesa · · 

" 

. ·1t is proposed that eaoh or the above types ot systems 

be· disouased according to the so.tiedule set ·:rorth in 'bfte" E~A ~heretoo · 

'! 9P BB0RlB'l' 

T CJ:P.~S ~E ~C~R~E~T _ 
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e . . REF ID:A67305e· 

-- T ·o P S E C R ET 

'f 9P S!GRi'! o" s a ms Q}U,¥7 . ";-. 

Afpen&1x ie Enclosure :Ji. 

I.o Desirable C.haracter1st1os o 

Ao General 

1., Objective 

2o Type or level ot Employment 

Bo · Operational Charaoteriatics 

l,; Security 

a., · C17ptosecuri ty 

b" Rad1ati1on Securitf 

co Transmission Security 

2 o. Functional Requirements 

).. Radio Inter:terence 

4,.. Power Req·u1rements 

So Special Requir.ementa 

o-:- Physical Characteristios 

la Weight and Volume Factors 

2o Operat1on9 Transportat1on 9 Packaging and Storage Requirements 

. )..'.\ : Destruction Requirements 

Do Operation and Maintenance Cnaraoteristics 

ot Equipment 

E.; Comint Implications with R.espect to Conse"" 

quenoea ot Capture ot Equipment 

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~ Enclosure A (continued) 

II.. Pres·ent Equipment .... UaS.., 

A.. Demonstration or Description 

. . 

B.., Discussion concerning Adequaor According 

to I (Interim8 Long-range, Emergency) 

IIIa Present· Equipment ... U9Xa 

Ac., Description or Model Demonstration 

Ba D1acuas1on concerning Adequacy Aocording 

to I 

lVa Equipment under Development = UoSo 

Aa Description or Model Demonstration 

Bo Adoquao7 aooording to I 

Co Present Status 

Do Plans 

Ve: Equipment under Development =-UoKc 

Ao Description or Model Demonstration 

Be Adequaoy according to I · 

Oo Present Status 

Do Plans 

'f 0P SEeftE'f 

>YIF'Sa ms etlH ... 

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ENCLOSURE B 

. . 

SCHEDULE OJ' SPEC-IFIC ITEMS TO BE DISCUSSED IN Uo So ... BRITISH 

CONFERENCE ON THE EXCHANGE OF CRY.PTOQRAPHIC PRINCIPLES 

. 1,, .. It is proposed that the rouowing equipments be dis- . cussed under eao·h -or the categories listed belowcr The Appendix hereto sets :f'orth a brier description ot some of the individual 

equipmentso · . . 

.ai;· Special purpose·tel,printer systems tor 

the exchange ot 1.μtelllgence material~ . . 

.ASAM 2 ... 1 · 

Low echelon (minor war vessels·) telegraphic . · aystemae . Merchant ship telegraphic systems., 

EO 3.3(h)(2) 

PL 86-36/50 USC 3605 

systems Strip ·systems 

di;) Meteorological security systems·9 1nolu.ding tacsimileD teleprinter and telegrapho 

ASU~2 .. :NRL Oitax 

OSP )800A 

. AFSAM .... 1 

AS.AK 2 ... 1 

e~ .. Voice· security systems for tactical purposes,, 

. . J-9 . ~y~z..· \-'?/ Bu.A.er lOW=eohelon oiphony s1stem·~ 

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Appendix to Enclosure ~ 

SHORT.TITLE DESCRIPTION 

AS.AM. 2=1 ·Teletype cipher device used with l)lB2 subset 

table9 Modified Al'my·ASAM-1 or Na'VJ' CSP~l500o 

APSAK 1 Converter.MX-507()/Uc Low echelon0 electr0= 

meohanical ort-line cipher equipment o· .• 

As.AX 2 Facsimile security equ1pmen~ tor enciphering weather mapso 

OSP )800A MOd1t1ed CSP~3800 to p-rovide ano1phe'rm.ent ot 

digits tor weather trattico 

M0!/1 14ech'111oal C1pher Machine ._tor low echelon literal 

requ.irt!mentaa 

Y=9 Statt level c1phoJlT system to provide speeoh security ovar short oircuits serving various Staff 

Commands,, · · . .. . 

Y=4 _Low echelon speech security system., 

NRL Citax Facsimile security· equipment tor the encipherment 

ot wea~her mapso 

""SESRE'r.:.- _Appendix to Enclosure B 

8. a. sns 'ua.Y 

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