••• 

REF ID:A71733 

DEPARTMENT OF D·EFENSE 

ARMED FORCES SECURITY AGENCY 

WASHINGTON 25. D. C. 

~. 

••• 

SUBJECT: Outline ot British Cryptologic Organization 

IN REPLY REFER TO 

Serial: 00076 

1~IAR1952 

1. In accordance with your recent request, there is inclosed herewith (Inclosure 1) a document showing the current structure of the 

British cryptologic organization, together with a brief outline of the 

charters of the various agencies. · 

2. The da.ta came from British sources and may therefore be considered accurate. 

3. The current membership of the Boards, LSIB Senior and Junior, 

and their Committees is shown in Inclosure 2. As you probably alreadT 

know, the Di.rector-General of SIGINT, Major-General Sir stewart G. 

Menzies, is being retired this coming autumn; the Director-General, GCHQ, 

Sir Edward Travis, is being retired on 15 April 1952, to be succeeded by 

Mr. Eric Jones. 

4. Although Inclosure 1 contains data relative to the Cypher Policy 

Board probab]J.r sufficient for your purposes, more detailed data can be 

furnished upon request. The membership of this Board currently consists 

of": 

Chai.man: The Director-General, Government Conmunications 

Headquarters. · 

A nominee of the Chiefs of Sta.ff (representing all three 

Fighting Services. The present representative is the Director 

of Signals, War Office.) _ 

:permanent Secret~, The Treasury. 

Secretary-, .....__~~~~~~~~~~~ 

PL 86-36/50 USC 36-G5 

S. I hope this information, the forwarding of which has been dela.red by lf13' illness, will reach you in time to be of use. 

document contains intormation 

ing the national defense ot 

the Uni d Stat@s within the meaning ot the ~icnaoe Laws, Title 18, 

\;.s.c., seotic ·•· 793 and 794. The 

transmissi!lftc.:RjSu .r~valation of 

its contentsA4tlltailyd to an 

unauthorized person is p hibite4 

Consultant 

bY law. See aJso Public law 

81 Congress second T~H'--~~~~t-1-li:~ 

_)eclassified and approved for 

elease by NSA on 02-28-2014 

Jursuantto E .0. 13526 
REF ID:A71733 

g_~ • 17 March 1952 

* BRITISH CRYPTOLOGIC RELATIONSHIPS 

CHIEFS OF sr AFF 

COMMITTEE 

CABINET 

INTERDEPARTMFNTAI 

COMMITTEE oN Ii 

CENSORSHIP 

11-------

INTERDEP ARTMENTAI 

COMMITTEE ON 

SECURITY ,,,_ _____ _..... I I 

LONDON SIGNAL Dl.rectorINTELLIGENCE General, 

BOARD Chairman 

---------...... ----------~· 

GOVERNMENT 

COMMUNICATIONS 

HEADQUARTERS 

JOINT 

INTELLIGENCE 

COMMITTEE 

SECURITY 

SUB-COMMITTEE 

CYPHER 

POLICY BOARD 

* Throughout this paper, "British" is understood to mean all British territory other than the Dominions. Organizations similar to the British Signal Intelligence 

structure are lmown to exist in Australia and Canada.; presumably, the other Dominions maintain like organizations. 

SECRET - ~I 
- 

, 

- ... . .. ·~ -

SEGREf- REF ID :_A71 733. 

17 March 1952 

THE CYPHER POLICY OOARD 

ORGANIZATION 

EO 3.3(h)(2) 

PL 86-36/50 USC 3605 

-

CYPHER POLICY BO.ARD I 

' 

' 

SPFECH SECRECY 

PANEL ' 

! 

2 

SECRET 
-. '" REF ID: A71 733 • 

.: SECREf 17 March 1952 · 

1. The Cypher Policy Board is a Cabinet Committee. The Terms of 

Reference o.f the Board are: 

a. 

b 

c 

I Membership consists or representatives ...._~~~~~~~~~~~~~~__J 

from the Signals DiviSions of the Admiralty, the War Office, and /'the Air 

Ministry, and representative~ trom GCHQ, including the Secret817 of the 

E03.~{h)(2) 

PL 8p-36/50USC 3605 Cypher Policy Board. . , 

:Membership consists of two representatives from each cypher-using Government 

3 

SECRET 
. 

'SECRET 

REF ID:A71733 

17 March 1952 

ltO 3,3(h)(2) 

Pt 86-36/50 USC 3605 

Department, including GCHQj the Secretary\ of the Cypher Policy)3oard acts as 

Chairman. 

4. The Speech Secrecy Panel 

,____ ___________________ __ ~ership consists or the 

Engineer-in-Chief of the General Post Office, who serves as Chairman, and 

representatives from Admiralty, War Office, Air Ministry, Ministry o! Supply, 

and their associated Research Establishments, GCHQ, the Secretary of the 

Cypher Policy Board, I 

Membership consists of representatives from the Admiralty, War Office, Air 

Ministry, Foreign Office, Ml.nistry of Supply, GCHQ, and their associated 

Research Establishnents, \ 

\ The Secretary of the Cypher Policy Board serves as Chairman. ,__ ___ --..l 
I 

REF ID: A71 733 -. 

. e 17 March 1952 

IDNDON SIGNAL INTELLIGENCE OOARD 

ORGANIZATION 

Chairman 

Director-General of ~gnal Intelligence 

Admiralty Director ot Naval Intelligence 

Director ot Signals Division 

War Office 

Director of Military Intelligence .Director of Signals 

Air Ministry 

Assistant Chief of Air staff (Intelligence) 

Assistant Chief of Air staff (Signals) 

Foreign Office 

Assistant Under-Secretary of state 

* Security Service 

.Director-General 

* Joint Intelligence Bureau 

Director 

* Directorate ot Scientific Intelligence 

Director-General 

Govemment Communications Headquarters (GCHQ) 

Director, GCHQ 

* These three Departments were added to LS~ in 1951; they will be represented 

as necessary on the subordinate· Boards and Committees. 

5 

SECRET 
~, ... REF ID:A71733 • 

LONDON SIGNAL INTELLIGENCE BOARD 

CRGANIZATION 

CHIEFS OF STAFF 

COMMITTEE 

Legend: 

LONDON SIGNAL 

INTELLIGENCE 

BOARD (LSiiB)· 

------- Operational 

- - - - - - - - - - Administrative 

FOREIGN OFFICE 

-t----.,.._ __ _, l 

I 

I 

I 

I 

I _,___ __ ,.__! ___ __ 

DIRF.CTOR-GENERAL 

t--------___. SIGNAL INTELLIGENCE 

6 

(CHAIRMAN,, LSIB) 

--------------t I I 

:··// 

EO 3.3(h)(2) 

PL 86-36150 USC 3605 

SECRET 
[ 

SECRET 

REF ID:A71733 • 17 March 1952 

- SJ!X:lt!T - S!etJftffi 1Nft>Rtfld110N . 

1. The British Signal Intelligence Organization operates under the 

general direction of the Chiefs of staff and the Foreign Office. It is ad-

. ministered by th~ Foreign Office.'under the direction·of the Director--Oeneral, 

Signal Intelligence~ who is Chairman.of the London Signal Intelligence Board. 

2. The Board is re_sponsible for: 

/i 

3. 

' ·-

I Representation in ... 

eludes members from the Admiralty, the War Office, the Air M:l.ni.stey; the 

Foreign Office, and GCHQ; the Chairman is the Director, GCHQ •. E03.:3(h)(2) · PL 86-36/SOUSC 3605 

--------------------------...... ! Members rlnclude 

representatives fran the Admiralty, the' War Office, the Air.Ministry, the 

Foreign Office, and GCHQ. Co-opted members include representatives from the 

Joint Intelligence Bureau, M.I. 5, M.I. 6, Directorate of ~cientific Intelligence, and the Colonial Office. The Director, GCHQ, is Chairman. 

5. J 

1 

SECRET 
• 

REF ID:A71733. 

SECREf 

Sf!iGRF.l'i' SECHRlft INR>RMA:'ffON 

E03.3(h)(2) 

PL 86""36/50 USC 3605 

17 March 1952 

I ~mber;~P includes representatives fromthe Admiralty, the L..-------' 

War Office, the Air Ministry, and GCHQ; the Ch~ima.n is the Head ot the 

Technical Department, GCHQ. 

6./ 

L..------------------------__.,. _ ___.\ ~' Membership 

includes representatives from the Admiralty, the War Office, the Air Ministry, 

the .Ministry of Defense, the general Post Office Research Establishment, the 

Department of Scientific and Industrial Research, and GCHQ. Representatives 

of other Government Research Establishments may be co-opted as members when 

desired. The members of the Committee take .. it in turn to act as Chairman 

for a period of one year each. 

7. 

Membership comprises representatives om 

the Admiralty, the War Office, the Air Ministry, the Ministry ot Supply, 

the Ministry of Defense, and GCHQ. The Chairman is a member of GCHQ. 

8 

SECRET 
... - . ~ __, 

e REF ID:A71733 e 

i·op SECRET 

24 

USCIB: 14/97 

24 November 1950 

EO 3.3(h)(2) 

MEUORANilJM FOR TlIE MEMBERS OF USCIB: PL 86-36/50 USC 3605 

Subject: lJiemberahip Rosters for the London Sig-

/ nal Ijt:!ai~q~ec~:r~t~eso ' . lo The subject rosters are f orwa.rded 

herewith for information and fileo 

I 

USCIB: 14/97 

/~~ Jo Wo PF..ARSOH 

Secretar1at 9 USCIB 

TOP SECRET 
•. 

- MEMBERSHIP LIST 

17th OCTOBERs 1950 

.LONDON SIGNAL INTELLIGENCE BOARD 

CHAIRMAN 

Major-General Sir Stewart Go ~enzies 

AD!::IRALT!' 

Rear-Admiral E. ':l" Lo Longle7 Cook 

Captain RoGo Swallow, RoN~ 

':VAR OFFICE 

Major-General A.Co Shortt 

Major-General ~aAa Scott 

AIR MINISTRY 

Air Vice Marshal NaCo Ogilvie-Forbes 

Air Vice Marshal EoBo Addison 

FOREIGN OFFICE 

Sir Ed\vard Travis 

.CHAIRMAN 

Director=General ot Sig1nt 

Director of Naval Intelligence 

Director of Signal Division 

'Director or Jrilitar.r 

Intelligence 

Director of Signals 

Assistant ·chiet ot Air 

Staff (Intelligence) 

Assistant Chief of Air 

Staff (Signals) 

EO 3.3(h)(2) 

Director PL 86-36/50 USC 3605 

Sir Eclward Travis Director, G.CoHoQo 

TOP SECRET 
. ' 

]'• 

ADMIRAL'l'Y 

Com.~ander IoMo Balfour. R.N. 

!fJ\R OFFICE ~Q3,3(h)(2) 

Director of Signal Division ~ection 9 

Colonel Vlo SCott PL.86~36/50 USC 3605 Mill tary Intelligence Section 8 Colonel 

AIR .MINISTRY 

Group Captain TaPuPoFo Fagan 

FORZIGN OFFICE 

G.C .. H.Q.. 

CHAIRMAN 

Sir F.dward Travis 

ADMIRALTY 

Captain A.J. Baker-Cresswell• R.N. 

'!TAR OFFICE 

Brigadier R.F. Johnstone 

TOP SECRET 

Deputypirector ot S~gn~ls (Bl 

Deputy Director of Naval 

Intelligence 

BriRadier General Starr 

(Intelligence) 

... ·-· -- - -··---- .. 

·······... · .. 
... 3 ... 

AIR M!NISTRY 

Air CbmmodoreA~Jo Rankin Director· of Inte lli~ence · (Operations) 

FOR~IGN OFFICE 

CO-OPTED MEflBERS 

Representatives ot: 

E0$.3(t1)(2) 

PL 86.::36/SOUSC 3605 

CHAIRMAN 

ADllttRALTY' 

Joint Intelligence Bureau 

l!.oio5o 

Malo6 

Directorate of Scientific Intell~genoe 

Colonial Ottice 

Lieuto-Commander HoKo SerJeant, RoNo Representative ot DoS,D~9A 

TOP SECRET 
e-T~~ 

WAR OFFICE 

Lieuto-Colonel P.\V. Lonnon 

AIR /fllNISTRY 

~ing Commander Fo w. Hudson 

t:o 3.3(h){2) 

PL 86-36/50 USC 3605 

ADMIRALTY 

~1AR OFFICE 

AIR MINISTRY 

l 

MINIS'l'RY OF DEP'ENCE 

... 4 ... 

Representative ot M.I~8 

Colonel 

Representative ot 

D.D.S.(B) . 

----. -- -- ,. __________ _ 

TOP SECRET 
.... 

- s -

Oapto CoFo Booth Representative ot GoPaO·> 

Research Establishment 

In addition, representatives of other Government Re~ 

search Establishments may be co-opted as meabers when desired .. 

The members ot the Cor.mdttee take it in turn to act 

as Chairman for a period of one year each~ 

CHAIRMAN EO 3.3(h)(2) 

//// 

_______....._.. _____ ! PL 86-36/50 USC 3605 

ADMIRALTY 

Representative of Director of Signals Division 

Representative of hdmiralt7 Signals and Radar Establishment 

\'TAR OFFICE 

Representative of U.Io8 Colonel 

Representative of MoiolO 

AIR MINISTRY 

Representative or Deputy Director or Signals (B) 

Representative ot Central Signals Establishr.lent 

TOP SECRET .. 
----· REF . In··: KT1·733-~- -·· .. 

TOP SECR~ ... 6 .... 

MINISTRY OF SUPPLY 

Representative of Director· of Technical Radio 

Development (Defence) 

MINISTRY OF DEF~1NCE 

Representative Of Directorate of scientific Intelligence 

Departmental representatives ~L 86-36/50 USC 3605 

EO 3 . 3 ( h) ( 2 ) 

SECRETA..~IAT, L~SoloBo 

~ --~;;; aooument contains intormati 

cti~ the national deten ~ 

ted States within e maaa--

ing s, Titie 11. 

and 794. 2.118 

Secretary, LoSoioBo