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USCIB: 'J:J/294 APPEMBBB Be6SMSN'f'S 0eH= 

'f AIN eeBE W0RB Mt'f WAL 

'J:OP ~ SB9URH! lNPell&\fteH 

MEMOHANOOM FOR THE MEHBIRS OP USCIB: 

Subject: Meuur• tor Increased Securit7 of CCllINT 

(ad hoc cCll'llllittee Report; Oil the Proposed 

Revision of Appendix B, BRUSA, and attach• 

men.ts therete>). 

l. The inclosed report, is forwarded tor studl' with a 

view to acnsideration at the Eightieth Heet.ing ot USCIB, to 

be held on 14 Novanber 1952. 

2. Attention is inY:l.ted to the fact that reterence B. 

listed cm page 1 ot the Incloaure, is a routine memorandum 

which forwarded USCIB l'J/266 to members of the Ad Hoc Committee. USOIB l'J/266 is held 1v all members as a part ot the 

t1nal minutes ot the ?8th usom Meet.ing. 

Inclosure - l 

Chrmn, Ad Hoc Cte, Memo tor 

Chrmn, USCIB, above subj., dated 12 November 1952. 

USCIB: l'J/294 

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eclassified and a roved for release b NSA on 02-19-2014 ursuant to E. 0. 1352 
CODE-WORD 

MArERIAL E"9CL0SEU 

MEMORAi"'mUM POR THE CBAIRMAH, USCIB 

NOV 12 1952 

StleJECTi Ad Boe Committee Report on tb9 Proposed Revision ot Appendix B. BBUSA and 

Attaohmenta theretoo 

REPERElfCES: Ao USCIB 13f266o 

Bo UC #000282 dated 1 August 19520 

Co uscm 13/276? 

1.. Pursuant to the de·c1a1on ot USCIB at its 19th 

• meeting! the Ad Boe Comm1tt.e pro=••4ed to vork out an 

agreed UoSo view aa to tbe aaaignmant or tbe various 

systems ar.d claaaea ot COMDl'l to the nev categories whieh 

iiOUld be eatab11abed by the revision ot Appendix B. BRUSA 

(Reference Co) 

2o . The Ad Hoc Committee baa completed tb1• taak b~ 

producing a categori~a~ion ot the·varioua systems and 

~~.asses or COMINi' o.a Exhibit 1 for attachment to the 

propo~ed ra71a1on ot Appendix B. BRUSAo Tbe Ad Hoc 

~ommittee b&s agreed unanilloualy on categorization aa..4 

9rasenta it to the Board tor approvalo Exhibit 1 ie 

stta~hed hereto aa Ene~oaure Ao 

3o In the coUl'ae ot the long and complex diacuaaiona 

which led to ulttmate unanimity on the tol'lll and content or 

Exhibit l. it be~ame apparant that categorization alone 

~ould not provide a complete solution to the utilization 

TOP SECRET SECURITY IHFGilt~~ATISa 
problemo !'be Committee. t._retore, unl!ertook tbe study 

of utilization vltb epac1t1o rof'e:renoe to tbe b&nclllng or 

eerta1n 1nte~na1 and 1nte:rnat1ona1 plain tezt1. lJaanimoue 

agreement va1 alao 1'8aebe4 1n 4ev1a1ng a plan fol' a broader 

use ot eucb text• vith1n tbl Pl'OPG••d •v•tea or oategorl••o 

It vaa plain, hoVever, that th1• plan could not tol'll a part 

ot the Bxh1blt but belonged, rather, vlthln Appand1.x B lteelt 

aa approved b7 USCIB at tbe 19th ••ting. 'the Commit.tee, 

therefore, baa agreed unan1m.oualJ' on a turtber rev1e1on ot 

paragraphs 29t and 29h ot ReYiaed. Appendix Bo fhla further 

reY1a1on ia attacbed barev1th aa Bnoloaul'e B. 

'!he Ad Hoo Com1ttee reccanen411 tbat: 

a.. 'l'be Boal'd approve Bnoloaurea A and B, 

b.. 'lbat dl'&tt Appendix B, a• now f'urtber 

reY1ae4, and Exhibit l thereto be tol'Varde4 for 

intorme.tlon and coaent to the Cbairman,, L8IB. 

A d~att letter or tran•m1ttal 1• attached 

bel'8to as Encloaure c .. 

c.. 'l'bat the operat1ona at the Ad Hoo 

Camnittee be terminated torthv1tho 

' 

~- Ac~~~Fn.~!1141fet..~ Chairman 

USCIB Ad Boe Committee 

Bncloaul'ea: 

Ao Dl'att Exh1b 1 t 1 D 

Bo Dratt Rov1s1on ot Paragrapbas 29t an4 29h. 

Co Dratt letter ot transmittal 

to Chairman, LSftp SE£RET SEOURfTY INFORJ~AT!~~! 
• WOP IBQRBl1' QU191 -----=--, ... ~ 

APPENDIX B 

Bxbibit 1 

-~~~~~~2~a 8 

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22-611~/ 

In acool'4ance v1tb tbe det1n1t1on or each oattgor1 de1-

cribe4 in Appendix B, COMDl'l u tertal vlll a. categcrlsed u 

tollovaa 

I. 2!.,t.e&op_!. 

A. 'D/11 tl.x•• anl bearlna•. pro•lde4 ttaa• 

no lnterpNtatlona of ehanglng call •lln 8Jltftlt 

are 1ncluc.ted. 

B. 'lactioal. plain text tt-artto provided 

that no interpretations ot changing call atgn 

a1atema, enciphered •P reterencea, or reeulta 

·ot ad•anced trattic analysis are 1nolude4. At 

preaent, this material includes: 

1. Local pl'oceclural and 

loaal 81'14 and zone 17atem•· uae4 . ror artillery d1rect1onJ tactical 

control and movement or front line 

- unita; and earl¥ warning and exera1ae 

ot tactical combat control ot a1rcl'&tt. 

c: crJ.pt-1nte111gence trom ana1~~1• or l'&clar 

t~acking and v1eual obaerYation report• aa found in 

plain language tactical trat"tlc. 'those will 1nolude 

grid or zone values and. procedural oodee used. tor 

1NqLpSJJRE A 

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~E'tmftfti~ -2- -····-·· 

brevity but ~111 ~ot in~Jl.ude .( 1} L.I ____ ....,. 

I lde3ignatiorrns a~ found in the current 

1 ~rndJ ~ sy~#~ms o~ ( 2) any interpretations or·c~nging call sign systems~ 

EO 3. 3 I h I I 2 I 

PL 86-36/50 USC 3605 

\ 
\ 

\ 

'.w· SJ!Cl!ft eAMOE. •:I!~~~s91 · 

[NOTE: 

-3- ' 

'l'he a~owe 11@t io 1 t:{!i @Wtitirety 153 vali@ S.$ ot" 

13 O©tob@r 1952. °the lfflat\!lN ot the.~tl @t•ypto- ®y~t@Jm@ i® ~u©b &Ii to impose th® tme@@IDsity- of @©Mt.3~ti li'll.lrW@-1)].)).af1!!©(.l BIJ\!.d NWi!§i@fh/ ot th@il? i!.l~ti111f( ift Cat@goey IX. !h.e ateow® 11~~ i; 

iin®ll.~m©@l itm thi~ bftil:l!.bit imi o~dGX' to giw@ the 

·llflilo©t p~@imis. pict\rlm po~@ib)).1$ of /tb.s typeQ of' ~wy~to ... Gyotemsi tah1@h "WiUl. tlile i11ac'Au~ecQ ill'A · ©at@e;oey IX.] 

EO 3. 3 I h I I 2 I 

PL 86-36/50 USC 3605 . i 

l<' P SECRET CANOE 

... : 
• TOP S~[jfJn :QAj1" 8 

WOP IBGRB'I Q:Afff>B • 8B88REH INPeRMA:fI61f •• --- Bo Plain texts. 

lo All plain texta -- including treel7 

available privacy and brev1t7 aratema such •• 

coDID9ro1al codos -- except those apec1t1ca11J 

assigned to other categories. [NOTE: The 

prov1aiona of Appendix B, Paragraph 29t vill 

apply only to .....__ ____________ _ ....._ ____ ...... ~r.,_dio plain text a o ] 

C. Tratt1o 1nte111s•nce. · [fhls includes the 'l'J'pe B . 

ca11-a1gn complex 1taelt.] 

1 o All traffic 1nte111gence except 

(a) fbat included in Eo 3.31h1121 

PL 86-36/50 USC 3605 

Category I; and 

(b) -, -------ii 

fand an,- L----------~ 

materials involving theae 

spec1t1c systems. 

III. Cate1orz III. 

Ao All materials not apec1r1cally assigned to 

Categories I and II. 

Bo Material involving reTelation ot aucceaa against 

unusual_ aenaitive, or complex tranamiaaion procedUJ.'ea and 

devices peculiar to the t;arget will automat1ca11J be placed 

in Category III until determination ot a more appropriate 

Category baa been madeo 

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EO 3.3(h)(2) 

REF ID:A659BB PL 86-36/50 USC 3605 
EO 3.3(h)(2) 

REF ID:A659BB PL 86-36/50 USC 3605 
EO 3.3(h)(2) 

REF ID:A659BB PL 86-36/50 USC 3605 
• 

,,, . • 

'!IQP IEtRi'I = &BgijRiff IJIP9UIAft011 

DRAP'l -... -- -~ - NEJIOltAllOOM .POR t'BE OJIAIIUIA.1'1 LSIB 

SUBJIC'.r: lurther U.S. Pl'opoeal• ror JftvlelQn «>f 

Appen01X B to th• BRUSA Agretrnent. 

1. On 19 Septelilber 19tt2 USCIB .forwa1"d~d t;o '.JOU a 

drart :teviaion of AppendiJC 8 to tbo BRUSA Agne:iant togetbel' 

with a reque at tor 10~ v1e1a on th1a dratt. 

2. In the courae ot tUl'ther atudJ' on th1a matter, 

USCIB has prepared a draft. ~:xhibl t 1 for attachment to 

the dratt rev1a1on of Appendix a. Thi• i• attached heretc 

as Enclosure A. 

a. It' 1a the view ot USCIB that tbe development ot 

thia Exhibit neceas1tatea acne amendments to the drart 

rev1a1on or Appendix B aa previou111 rorwarde4 to 7ouo 

!!heae amendments are attaobld hereto aa Encloaure B. 

-&. 1he v1ewa ot the London Signal Intelligence .... 

Board are requested on both these 4ocumenta. 

w. 8. Smith, Cball'lllan 

United States Commun1cat1ona Intelligence Soard 

Enclosures: 

A. oraf t Ex.hi bit l. 

B. Amendment to dl'at't reviaion or 

Appendix B, BRUSA. 

BHCLOSURB...£ TOP SECRET SECUmff mfQl\MAl'ION