41756329079550

41756329079550_page_1 REF ID:A67163 APSAn00/dk TOF Serkelt 000241 eee 4 NOV 1850 SOBSZCTs Reports of the United Kingden-United States Comuniecation Security…

41756329079550_page_10 o¢ , REF po OO en BRUSA COMSEC CONFERENCE Schedule of Meetings for the Week Beginning 9 October 1950 Monday, 9 October 1950. 100C Meeting…

41756329079550_page_100 MR. MILLER replied tn the affirmative; he stated that he understood the function of the Executive Committee was to hear the findings of the…

41756329079550_page_101 od @ REF ID:A67163 - Fop-seerer @ MR. FRIEDMAN explained that the agenda that Mr. Miller had received didn't contain the CCM item and…

41756329079550_page_102 REF ID:A67163 a e ‘MR, MILLER inguired of Mri, Friedman as to how long in advance of meeting dates he would like pertinent papers cir-…

41756329079550_page_103 é e @ REF ID:A67163 FOP-SEECRET 27 Septenber 1950 HEMORANDU FOR THE LMBERS OF THE BXECUTLVE COI TIER: Subjects Tentative linutes of the…

41756329079550_page_104 REF ID:A67163 \L ‘ 2 @ , : @ BRITISH = UNITED STATES COMMUNICATIONS SECURITY CONFERENCE MINUTES OF THE FIRST MEETING OF THE EXECUTIVE…

41756329079550_page_105 2 REF ID:A67163 . @ FOP-SEECREF MR. MILLER inquired as to the arrangements for recording the proceedings of the Conference. MR. FRIEDMAN…

41756329079550_page_106 REF ID:A67163 sp @ Gt _MR. MILLER stated that he was most enxious to get along with the proceedings, and inquired if it would expedite and…

41756329079550_page_107 @ = REE. DUBS ILES® MR. MILLER replied in the affirmative; he stated that he understood the function of the Kxecutive Committee was to hear…

41756329079550_page_108 , ; r REF TD: ACTIOS Ne bee MR, FRIEDMAN explained that the agenda that Mr. Miller had received didn't contain the CCM item and stated that…

41756329079550_page_109 @ REF ID:A67163 r) “TOP SECRET * MR. MILLER inquired of Mr. Friedman as to how long in advance of meeting dates he would like pertinent…

41756329079550_page_11 PY REF ID:A67 163g oe. WE tee 5 October 1950 SUBJECT: BRUSA Commmication Security Conference. TOs Individuals listed in paragraph 2. , i.…

41756329079550_page_110 © REF ID:A671g3 SECRET ¥F COMSEC COM ERENCE Working Group No. 1 17 October 1950 “SEGREE— Chairman's Memorandum No. 6 Working Group Wo. 1…

41756329079550_page_111 _ -BRUSA COMSEC CONFERENCE SECOND REPORT OF SUB-COMMITTEE B TO THU SXECUTIVE COMMITTEE _ Sub-Committee B resumed on 17 October after the…

41756329079550_page_112 SECOND REPORT OF SUB~COMMITTES B TO THE EXECUTIVE COBITETES 1. Sub-Committee 5 has made an exchange of technical information concerning…

41756329079550_page_113 FO@-SE Cress Seritst— @ —ToPr-saenet— 5. In the course of the discussions on equipments using one-time tapes, a brief description was given…

41756329079550_page_114 ry REF ID:A67163 —SHeREE— Apparstus 5 U.C.0, Single Channel No, 2 On-line teleprinter cypher system, Size and weight 6" x 19" x 20" 500…

41756329079550_page_115 _ oe BRUSA COMSSC CONFERENCE SECOND REPORT OF SUB-COMMITTEE B TO TH& ZXKCUTIVE COMMITTEE Sub-Comnittee B resumed on 17 October ‘after the…

41756329079550_page_116 "Ar seshere BRUSA COMSEC CONFERENCE SECOND REPORT OF SUB-COMMITTEE B TO TH’ EXECUTIVE COQMNITTsE 1. Sub-Committee B has made an exchange of…

41756329079550_page_117 @oF SECRET. “x TOP-SECRET 5. In the course of the discussions on equipments using one-time tapes, a brief description was given of British…

41756329079550_page_118 qe REF IDA AGFIES @ Sror SERRE Apparatua 5 U.C.0-. Single Channel No. 1 . On=line teleprinter cypher ‘system, Size and ‘deight _ 6® x 19" x…

41756329079550_page_119 ; BRUSA COMSEC CONFERENCE ae FIRST REPORT OF SUB-COMMITTEE B TO THé SCICUTIVE COMMITTES The meetings of Sub-Committee B began on 27…

41756329079550_page_12 - REF ID:A67163@ ee oe FOP-SEERET _ 27 September 1950 MEMCRANDUM FOR THE LEMBERS OF THE PLAVARY COLT TIRE Subjects Tentative Minutes of the…

41756329079550_page_120 13 October 1950 BRUSA COMSEC CONFERENCE FIRST RSFORT OF SUB-COMITT Zs BTO Me sXscurive COMMITTZE 1. Sub-Committee B has made an exchange of…

41756329079550_page_121 4. Incidental to the discussions of the various crypto systems consideration was given to the problem of the number of different sizes of…

41756329079550_page_122 REF ID:A67163 B, Merchant Ship Telegraphic Systems. 1, we note that Cursex is under consideration in the US-UK _ SCEC and is likely to be…

41756329079550_page_123 (3) Teleprinter - ASAM 2-1 (4) Faceimile - None available c. To meet the long term requirements for encipherment of meteorological data…

41756329079550_page_124 (1) (2) (3) (4) G5) (6) ASAY 8 Hallmark Sorcerer AN/TRA 16 D=70 (primarily designed as a low echelon ciphony attachment; can be used only…

41756329079550_page_125 da, ‘That a copy of the final report of the conference be submitted , . to the U,S.-U.K, JCEC and that the U.S.-U.K. JCEC be requested to…

41756329079550_page_126 “ * REEpAR AS71163 * — @ OSSEDRET e ARSAM 7 OPF-LING PsRMUTING CYPHER MACHINE FOR TACTICAL USE Size 12" wide by 12" high by 6" deep,…

41756329079550_page_127 REE, TD»A67163 ‘ , @ Ha ‘e 16" x 12" x 6" less case Shae 169 x UY" x & with case Weipht Approximately 27 bs less case 4pproxinately 35 Ibs…

41756329079550_page_128 Size 16" wide by 12" high by 12" deep, appraximtely Wieleht 100 Ibs approximately ) C ption - 7 rotor nechaniem using the, carcase of CSP…

41756329079550_page_129 Ande: A67163 " 2” @ att @ ‘LROWR Bat _(osp_4800) Mester, Features: (Continued) A variant of this mchine for weather operation (ees 2 mat)…

41756329079550_page_13 : REF ID:A67163 Coe oe e@ BRITISH - UNITED STATES COMMUNICATIONS SECURITY CONFERENCE . MINUTES OF THE FIRST MEMTING OF THE PLENARY…

41756329079550_page_130 REF; 7163 J @ CERAES r ; nPpoyt Size 3 cuble foot = 12" x12" x 6" approximately . Weight 15 pounds , . ‘Technical Description - This…

41756329079550_page_131 r > 7163 °° ocean ponyes nee ceo: @ “SHH? @ . e CSP~3600 (CK OFF-LINE HAGSLINSTYPE CIPHER MACHINE Size 10" wide by 10" high by 6" deep…

41756329079550_page_132 BFaQiPsA67163 ° @ scott e £ ASAX 2 CIPFAX rule EIVER FOR USE wITH BLACK-HHITE COPY, PRIMARILY FCR WEATHER MAPS Size 1 Ruck approximately…

41756329079550_page_133 RE -Bk67163 ° ° r) beree e & NRL CIFAK CIFAX TRANSCEIVER FOR BLaCK=AHIT# WEATHER COPY Can be converted to full duplex by addition of a…

41756329079550_page_134 ASAY ""PTME DELAY SCRAMBLE CIPHONY SYSTSH Size 12" x 12" x 18", estimated. Weight 15 pounds, estimated, ’ Qutline Deseription ~ The…

41756329079550_page_135 . REF ID:A67163' ~ ® 7 @ Ft ASHY 6 Size Three bays approximately 5} x 2} x 1} feet, Weight Approximately 250 pounds per bay plus spare…

41756329079550_page_136 REF ID:A67163° ° @ “Eat? @ ' asay 8 SINGLE CHANNEL PCM CIPHONY SYSTEM Size 2 cases euch 12" x 12" x 18" estimated, Weight 50 1bs.,…

41756329079550_page_137 8 CHANNEL SPEECH SYSTEM FOR MICROWAVE RADIO Size 7 Ad’ bays (counting 100% standby) Weight About 1 ton (2000 lbs) . Outline Description -…

41756329079550_page_138 ; 7.5.5. Tactical speech encipherment system primarily for aircraft use, Size und Weight = About 10" x 10" x 18" and weighs 39 pounds.…

41756329079550_page_139 . m =F _iD:a67163 Py "ASAD 1 1, ASAD 1 4s a small hand substitution device, designed for use in multiseater aircraft for the trananission…

41756329079550_page_14 . @ FP SCCRET @O®@ ADMIRAL STONE opened the First Plenary Session of the Bri- tish - United States Communications Security Conference by…

41756329079550_page_140 L * —SHeneE- 1, RKC is a Literal hand substitution cypher, designed to give a high degree of security on strategical links where mchine…

41756329079550_page_141 @ REF ID:A67163 econ, == =—@ MERCURY (LATE TYPEX Mk 10) Synchronous on-line teleprinter cipher machine, — Size One 5°6" rack and four…

41756329079550_page_142 REF ID:A67163— e ‘ —— Ob ON-LING TELEPRINTSR SYNCHRONOUS CIPHER MACHINE Size . 16" x 8" x a" approximately. Weight 40 lbs approximately. ;…

41756329079550_page_143 | REF ID:A67163 ‘2° @ @ ‘Sige One 46" telegraph rack on castors Heipht 100 lbs approximately . ; Outline Description = in olsctrontoally…

41756329079550_page_144 REE ID:A67163— . @ Thins , td] & SEED Gongrad, ~ Singlot is a keyboard operated motor=driven, tape-printing . off-line permting cipher…

41756329079550_page_145 ) REF ID:A67163 ° « Genora), = Pentragon i an off-line cipher mohino using a perforated topo input ani producing a page-printed copy on.a…

41756329079550_page_146 REF ID:A67163_ . © eean rd] General = DUP 1 4s an off-line hand operated tape-printing aipher machine wlth an electrical permiting maze,…

41756329079550_page_147 e REF ID:A67163 - ‘ _ “SCORE! 3 BEE Ganga], - HED-FAX is a system for tho oncipherod transmission of black and white mteorological chartse…

41756329079550_page_148 RE@ERpRS7163 ° * eo. SLuNey @ x “HAEHRIARK PCM CIPHONY SYSTM! FOR TACTICAL UsAGS Size’ and Weight = Lab models consist of one 5'6" rack,…

41756329079550_page_149 F.ID:A67163 “Seat e (Planned) 2 double sided racks 56" high | 600 Ibs Outline Desert ption - PCM Vocoder analyais and synthesis system with…

41756329079550_page_15 - 0@ ADMIRAL STONE thanked Mr, Miller, and.invited General McClelland, Director, Communicationsesiectronics and Chairman of the Joint…

41756329079550_page_150 © REF ID:A67163 x 270 MULTI-CHANNEL CENTIMETRIC RADIO RELAY EQUIPMENT Size and deigh - Duplicate equipment consi sting of 4 transmitters, .…

41756329079550_page_151 REF _ID:A67 163 ° © @ PLAYFEX (SMALL SHIPS CYPHER 1. Playfex is a tactical hand system, designed to effect a very rapid change of code with…

41756329079550_page_152 7 REBAR 67163 e OUR @ LINEX 1. Ldnex is a literal hand substitution cypher, designed to give a high degree of security for forward-area…

41756329079550_page_153 aa = 1. Cursex is a literal hand substitution cypher, designed to give a high degree of security for strategical traffic where machine…

41756329079550_page_154 @ =F paste © ; —sHeREE : ereblile | bb OTMETCO . 1, Otmetco 4s a hand substitution cypher, designed for providing essential meteorological…

41756329079550_page_155 6 REF ID; A611 63 @ SECREE— OOM U : ce ALAMETCO 1, Alametco is a hand: substitution cypher, designed for the transmission of mstecrological…

41756329079550_page_156 6 REF anupegs 63 @ —SHERET- da ROTORS 26-Point Rotors It has been agreed on Sub-Committee A that rotors on both U.S, and British reviedons…

41756329079550_page_157 . ;@RERCTICS oe o ae imi @ dd ~ Rotors (continued) provides stepping control for the maze, The alphabet ring is used as a drive ring and…

41756329079550_page_158 REF IDGAGTEC3 “ “ @ . OEE w @ " COCK-ROBIN 1, Note: Cock-Robin is a basic cryptographic principle, and has many applications, It can be…

41756329079550_page_159 7163 = ee a Buel U ita CIPHONY SCHEME FOR GROUP WORKING Outline Deeeription of Proposal . A scheme for quantising speech into say 8 levels…

41756329079550_page_16 EE IDiRG1163 Soe Oo FEAR? MR. MILLER stated that he was happy to accept the Chairmanship. Before turning the Chair over to Mr. Miller,…

41756329079550_page_160 “BRUSA COMSEC CONFERENCE _ FURS! REPORT OF SUB-COMMITTEE B TO THE EXMCUTIVE COMATTES The meetings of Sub-Committee B begun on 27 September…

41756329079550_page_161 = % Tm. REF_ID 6h ee Cote at TTT AT ea, a Lor ke 10 October 1950 | —-ep-ssener— BRUSA COHSEC CONFERENCE RSPORT CF SUB-CCVETITS3 B TO THE…

41756329079550_page_162 ‘o 4. Incidental to the discussions of the various. crypto systems consideration was given to the problem of the number of different sizes…

41756329079550_page_163 REF_ID:A67163,. 2. ‘Je recommend that a muichine s: wy fuer than Cursex should replace it, when available, and that such a system should be…

41756329079550_page_164 G62 REEIDIACH Gh oy —PoP-sechst , : co (2) Telegraph = BOM 7 with provision for weather encipherment SAM 7 \ Pa ~ ; Singlet Pendragon DUP…

41756329079550_page_165 (4) Sorcerer (primarily designed for point to point ciphony over long and short distance circuita of normal band width) . a, (5) AN/TRA 16…

41756329079550_page_166 —EOP-SSGRET Sa BRUSA COMSEC CONFERENCS 10 October 1950 REPORT OF SUB-COVLIITed B TO THE EXSCUTIVE COMMITTEE 1, Sub-Committee B hus made an…

41756329079550_page_167 be Incidental to the discussions of the various crypto systems eansideration was given to the problem of the number of different sizes of…

41756329079550_page_168 2. de recommend that a machine system faster than Cursex should replace it, when available, and that euch a system should be selected…

41756329079550_page_169 EID AGT163.— e (2) Telegraph = BCM 7 with provision for weather encipherment. AFSAM 7 . . POM Singlet Pendragon DUP 1 = designed for…

41756329079550_page_17 Continuing his remarks, Mr. FRIEDMAN pointed out that it was assumed that this Conference would take cognizance of the foregoing articles…

41756329079550_page_170 (4) Sorcerer (primarily designed for point to point ciphony ~ over long and short distance circuits of nermal ; band width) (5) AN/TRA 16…

41756329079550_page_171 peo 7163 @op secre °@ BRISA COMSEC CORFERENCE Third Repo’ of Subsouittve & ‘ 24 Ostober 1950 le As racusded in the secon reper of…

41756329079550_page_172 . REF ID:A67163 @ and simpler mxintensnce and adjustment must clsc be providede (4) Esoentiel Teleprinter fecllitdes must be provideds It…

41756329079550_page_173 machines "PENDRAGON" of “SINGIZT" could interwork, whtle still being capable of working with existing cipher machines of the nation…

41756329079550_page_174 oe. ID:A67163 . {a) That interchargo of views, in particular, on recommendations {b), (c), and (4) aboves be continued. pr hadiMelren LE t…

41756329079550_page_175 »” Sc Lo “4 it 3 e8 BRUSA COMSEC CONFERENCE Third Feport of ©ubcommittee A 24 October 1950 1. As recorded in the second report of…

41756329079550_page_176 REF ID:A67163 id ee FOP-SEECRET It 1s In the interpretation of this last requirement that the U. S. and British views are at variance, 7.…

41756329079550_page_177 eb REF TD:AC7LE3 @ 10. We have further considered the matter of Teleprinter facilities and make the following recommendations: (e) That the…

41756329079550_page_178 REF ID:A67163 oe nd “TOP-SECRET to abandoning Bigramming and accepting the loss of two lower case characters (J and Z) and three upper case…

41756329079550_page_179 e REF ID:A67163 r | ; BRUSA COMSEC CONFERENCE Second Report of Subcommittee A 10 October 1950 1. As directed, Subcommittee A was reconvened…

41756329079550_page_18 , REF ID:A67163 . ee ee TOP—SEGCREH MR. MILLER replied in the affirmative. ADMIRAL STONE remarked that it might be possible for the…

41756329079550_page_180 wags . : “AGU163 ry ; P JEWAL @ BRUSA COMSEC CONFERENCE Firat Report of Subcommittees A wa. 2 1 (As modified by the Combined Executive…

41756329079550_page_181 REF ID:A67163 Sopseerer © improvemsnts in rotor design, and security improvements of present CCM ag proposed by the U.S. JCS in 207k/2…

41756329079550_page_182 » te Sor Sree” @ d. Rotors on both U.S. and British veraions of the 7-rotor BCM ‘to be physically and oryptographicalily interchangsable.…

41756329079550_page_183 Oop SECRET @ bh. Make available to the British the tools and diss for Mark I~ rotors for old Typex adaptera). . , i. Make available to the…

41756329079550_page_184 ore suthive » BRUSA CONSEC CONFERENCE four Gupek iS Subcommittes A 26 September 1950 1. Subcommittee A has held five mestings to date,…

41756329079550_page_185 ere: fen ans en) tT © improvements in rotor design, and security improvements of present CCH as proposed by the U.S. JCS in 2074/2 dated 27…

41756329079550_page_186 ore SEK @ \ a. Rotors on both U.S. and British versions of the 7-rotor BCH to be physically and cryptographically interchangeable. This…

41756329079550_page_187 - he aan ila pBritich pias tools and dies for Mark I nll ae i. Make Meee to British * tools and dray- ings of old TypeX adapter, new design…

41756329079550_page_19 , » REF ID:A67163 . @@5) sPeEEES ee ® ADMIRAL STONE announced that there would be a meeting of the Executive Committee immediately…

41756329079550_page_2 & ' REF ID:A67163@ BRITISHUNZTED STATES COMMUNICATIONS SECURITY CONFERENCE MINUTES OF SHE FINAL USDTING OF Tits PLENARY COLMMETIES The…

41756329079550_page_20 FOP-SECIQET =F 1:26710 @& Office Memorandum - UNITED STATES GOVERNMENT TO 2 AFSA-14, : DATE: 2h August 1950 FROM : DIRAFSA SUBJECT: ,S, —…

41756329079550_page_21 § REF _ IDjA67163 © % : DRA FT It is with a reat deal of pleasure that 1 weleone the British Delegation from GCAQ to the Unites states and…

41756329079550_page_22 . Se REF w:ac7ics Je results represented a major contribution in the sucessful outeone of that war. The details of that story are pretty…

41756329079550_page_23 TO | B REF ID:A67163 & highest level, and specifically on the CCM, but also we expect to discuss Combined Communications of all levels and…

41756329079550_page_24 . , ™ REF ID:A67163 & anawer would be, and they would reluctantly fold up their tents. I have 1 doubt an to where the members of the…

41756329079550_page_25 - Oo sHeRee & | with sexiaus operability. thea we have done that, then and only then ean our consciences ve clear as regards. our…

41756329079550_page_26 uf . _ Harper - — REF ID:A671 63 Sinkav Jolley Pollard Perrin Tiltman Sears Horton

41756329079550_page_27 B7163 ® 18 September 1950 SUBJECT: BRUSA Communications Security Conference POs Individuals listed in paragraph 2. : 1. The opening…

41756329079550_page_28 @ REF ID:A67163 @ BRUSA COMSEC CONFERENCE AGENDA FOR U.S. - BRITISH CONFERENCE ON THE EXGIANGH OF CRYPTOGRAPHIC PRINCIPLES . ‘a. Special…

41756329079550_page_29 @ “ mrneriee @ Rnelosure A I. Desirable characterisation, “Ae ‘General oh Objective ; ; ; - Type or: ‘level of Eaployment “B, Operational…

41756329079550_page_3 REF_ID:A67163 @ _20p_SECREP. ADUNAL STOHR called the mesting to order, le said that he had ree ceived a note irom Belgadier Generdl…

41756329079550_page_30 @ | ‘REF ID:A67163 @y Ir, II. VV. ‘Enelosure & (continued) Present Equipment — U.S. As Demonstration or Description B. - Discussion…

41756329079550_page_31 REF ID: AG7 1639 . “the Fifth Meeting of the Executive Committees. of the Beltish = United States Communications Security Conference - was…

41756329079550_page_32 we . FRIEDMAN stated: that the minutes of the Fourth Yeet- ing. were still in Preparation and were mot available for con- “sideration. Me…

41756329079550_page_33 ® REF ID:A67163 e MR. FRIEDMAN. Antroauced the final item for consideration and suggested that. the two final reports be considered para-…

41756329079550_page_34 For the Fifth meeting to be held at 1400, 27 Cotober,1950, in Room 1212 NAYSECSTA 1. Approval. of Minutes of Fourth Mesting. 2. Approval of…

41756329079550_page_35 @ rOP SEC ourth Kenting of the Executive Committee of the Britian = *Dalted States Communications Security Conference was hald at 1400 on…

41756329079550_page_36 eo 4 , & REF ID:A67163 @ THIRD EXECUTIVE Prior to consideration of the first item on the agenda, MR. FRIEDMAN weleomed Lieutenant Colonel…

41756329079550_page_37 - , MR. FRIEDMAN explained that Item 2 on the agenda would be deferred until Commander Trechman's arrival. He suggested that the Committee…

41756329079550_page_38 Po. @ REF ID:A67163 he he Amend paragraph 5 to read as follows: "S5..In the course of the discussions on equipments using one-time tapes, a…

41756329079550_page_39 ; i. FRIEDMAN requested Captain Sefford to read the Third Report. of Sub-Committes "A". Pa CAPTAIN SAFFORD road the roport, and after…

41756329079550_page_4 - e REF ID:A67163 e@ —2OP_SECRET— wmere is one aspect vhich has been bitught very firaly home to MBo- wwe tod in dire nesd of a caubinod…

41756329079550_page_40 ‘ e& Ee SECREY "y "(a) Accepting a tape, perforated on any Teleprinter employing the International Telegraph Alphabet No. 2. (Seo pege 265,…

41756329079550_page_41 4 @ SP secrete 11, Paregraph 10(@)-=- Insezt "That" before "“gince” in first, line... : : 12, Amend paragraph 10(e) to read as follows:…

41756329079550_page_42 - — FORME PUSS @ TTEK 4. REPORT OB PAYEIY PROE MR. FRIEDMAN stated that Captain Harper had some information pertaining to patent rights to…

41756329079550_page_43 (a) Arrangements for the protection of secret pro- cesses and secret technological information, as distinct | from patented and patentable…

41756329079550_page_44 . : . REF ID:A67163 e "™%, As far as is known in the Office of the JAG, notwithstendiag large and varied shipments of equipe- - ment to…

41756329079550_page_45 - p REE RASU163 DR. SINKOVY pointed oat that in Appendix ean, AFSAM 7, ‘under the heading "Cryptographic Features" the 1st line should read…

41756329079550_page_46 ts O57 FER @ IT!M 5, CONSIDERATLON OF THE PROPOSED REPORT TO THE U.3. AND Ue TOLNT CHEFS OF SHAPE GY GET BRUGR” COE ONS SECUR Eo _. MR.…

41756329079550_page_47 eo: REF ‘ID: A67 163 @ 50 Amend paragraph 4 as follows: "h, The general recommendations in paragraph 3 above together with the detailed…

41756329079550_page_48 .« ; REF ID: A67163 @ The. Executive Committee then agreed that the. following ‘amendments would be made to the Report to the British and…

41756329079550_page_49 we ; ° REF ID:A67163 e "{e) That there be annual conferences on . these subjects for the next four years, to be held alternately in London…

41756329079550_page_5 \l REF ID:A67163 y @ cerry 8 Plenary Commitece AGENDA Por the closing macting to be beid ef 1500, 27 Ooteber 1950, . le Approval of the…

41756329079550_page_50 e i Oo p JECRE I e ‘13. Appendiz.A, add new paragraph © as follows: SE. qelepri ater Systeme for the Exchange of Communication ntellizense…

41756329079550_page_51 Le eo 3e 5e REF ID:A67163 e BRISA COMSEC CONFERENCE Enesutdve Committes AGENDA For mesting te bo held at 1400, 25 Octebsr 1950 e- Approval…

41756329079550_page_52 Rerchprern— REF ID;A67163 ge 2? 18 Osteber 1950 MEMORANDUM FOR MEMBERS OF THE EXECUTIVE COMMITIER SUBJECE: Scheduled Usetings of the…

41756329079550_page_53 N ee BRITISH = UNITED STATES COMMNICATIONS SECURITY CONFERENCE MINUTES OF | 1 THE THURD OF THE EXECUTIVE COMM TITEL The Third Meeting of…

41756329079550_page_54 @ Res SeCRI TO LTEM Le APPROVAL OF MINUTES OF FIRST AND SECOND MEETINGS: | MR. FRIEDMAN inquired 4f there were amy comments or corrections…

41756329079550_page_55 REF SIR BET ICS T es @ TUF SECRET@. "arising from the use ‘of devices, processes,. or technological iaformation in connection with equip-…

41756329079550_page_56 r | eB SECRE T@ MR. FRIEDMAN stated that there was a paragraph in the Lend- Lease Law to the effect that the U.S. Government would…

41756329079550_page_57 © 55 PUES @ ITEM 2. CONSIDERATION OF THE SECOND REPORT OF SUBCOMMITTER "A". MR. FRIEDMAN requested Captain Safford to present the second…

41756329079550_page_58 , REF ID:A67 . Oop -secReT @ that 1b was being recommended thet they go one step further, and make provisions for the encipherment of…

41756329079550_page_59 @ TOP SEEREF @ CAPTAIN HARPER suggested that the use of PCM in the ree . port might be confusing to both British and U. S. representa~…

41756329079550_page_6 eo —SEEREY” “ep EYRE Octeber 1950 SUBJECTs BBUSA Commmication Security Conference TOs Individnals listed in paragraph 2. le Content sycaing…

41756329079550_page_60 @ GP sees e GAPTAIN SAFFORD stated that he could aot state definitely, but that it was his understanding that "BRUTUS” was being used…

41756329079550_page_61 @-7e SECRET SECRET @ DR. SINKOV stated that he thought that Mr. Miller was speaking of two wholly different concepts of the word "BRUTUS" '…

41756329079550_page_62 ITEM 3, CONSIDERATION OF THE FLRST REPORT OF SUBCOMMITTEE nBt, MR. FRIEDMAN requested Dr. Sinkov to present the first _Feport of…

41756329079550_page_63 1. Title - Change to read: "First Report of Sube Committee "B" to the Executive Committee.” 2. Paregraph la = amend to read: o- "Wen Benga,…

41756329079550_page_64 5, Paragraph 4 = add the following sentence at the end . of the paragraph: "This agreement would limit the number. of different types of…

41756329079550_page_65 13. Paragraph 5C5a ~ delete ", say, 1953.7 and substitute "1954." 14. Paragraph 505b(2) - add "Pancil and paper system for very low echelon…

41756329079550_page_66 - "®, That discussion and interchange of technical information on certain other items of combined interest, such as the security aspects of…

41756329079550_page_67 ae @ REF ID:A67163 @ MEMORANDUM FOR THE MEMBERS OF THE EXSCUTIVE COMMITTEE: Sub ject: Tentative Minutes of the Third Meeting. 1. The…

41756329079550_page_68 OFSRSEREF @ nas BRITISH = UNITED STATES COMMUNICATIONS SECURITY CONFERENCE / MINUTES OF / THe THIRD MEETING OF THE EXECUTIVE CONBIT TREE /…

41756329079550_page_69 ITEM 1 APPROVAL OF MINUTES OF FIRST AND. SECOND MESTINGS: © MR. FRIEDMAN inquired 4? there were any comments or corrections’ to be made to…

41756329079550_page_7 m REF ID:A67163 CO cccrer © Tones 12 October 1950 SUBJECT: BRUSA Communication Security Conference , TO: wr. W. F. Friedman 1. The Combined…

41756329079550_page_70 @ PEP SECRET O "arising from the use ‘of devices, processes,. or technological information in sonmmection with equip- ment, materials or…

41756329079550_page_71 MR. FRIEDMAN stated that there was a paragraph in the Lend= Lease Law to the effect that the U.S. Goverament would undertake to protect the…

41756329079550_page_72 @ 5 GE EPI? @ ITEM 2. CONSIDERATION OF THE SECOND REPORT oF SUBCOMMITTEE "A'’. MR. FRIEDMAN requested Captain Safford to present the second…

41756329079550_page_73 / @Tor wi be we INL E t ) ‘that it was being recommended that they go one step further, ond make provisions for the encipherment of…

41756329079550_page_74 (OTOP SEGRES r - CAPTAIN HARPER suggested that the use of PCM in the ree port might be confusing to both British and U. 3. representa- .…

41756329079550_page_75 . we wd tee tur I Lf ) CAPTAIN SAFFORD stated that he could not state definitely, but that it was his understanding that "BRUTUS" was being…

41756329079550_page_76 @TCHSECEET @ DR. SINKOV stated that he thought that Mr. Miller was speaking of two wholly aiffersat concepts of the word "BRUTUS" ag…

41756329079550_page_77 ITEM 3. - CONSIDERATION OF THE FIRST REPORT OF SUBCOMMITTEE "Bt, MR. FRIEDMAN requested Dr. Sinkov to present the first report oe soy…

41756329079550_page_78 @ 1G? SPERET @ 1. Title - Change to read: "First Report of Sub- Committee "B" to the Executive Committee.” 2. Paragraph le = amend to read:…

41756329079550_page_79 5, Pavagraph 4& =- add the following sentence at the end of the paragraph: ‘This agreement would Limit the number of different types of.…

41756329079550_page_8 REF ID: A671 005k? =e 5 October 1950 SUBJECT: BRUSA Coumunication Security Conference. TO: - Individuals listed In paragraph 2. i. The…

41756329079550_page_80 13. 14. 15. 16; 17. 18, 19. 20; 21. 22, 230 OTOP SECREP @ Paragraph 5C5a = delete ", say, 1953." and - substitute 1954." Paragraph 505b(2)…

41756329079550_page_81 @ T= scRE Tg - "b, That discussion and interchange of technical information on certain other items of combined interest, such as the…

41756329079550_page_82 REF ID:A67163 ee m @ 5p crear @ BEUSA CONSEC CONFERENCE EET Excutive Committes Mebting, 1400, 12 Ostober 1950 1. Approval of Minutes of lst…

41756329079550_page_83 ca ph, @ REF ID:A67163 e FOP SECRET am BRITISH = UNITED STATES COMMUNICATIONS SECURITY CONFERENCE MINUTES OF THE SECOND MEETING OF THE…

41756329079550_page_84 :A67163 @ 7A SREY ) ITEM 1. CHAIRMANSHIP OF CUMBINED EXECUTIVE COMMITTES MR. FRIEDMAN stated, for the record, that the Chairmanship for…

41756329079550_page_85 e REF ID:A67163 e COLONEL COLLINS said that it might be possible to forvard the Conference recommendations in two separate parts, letting…

41756329079550_page_86 4, Puragraph 7e(7) = Change to read as follows: "And _ Similar technical matters." 5. Paragraph 7e, final 3 sentences - Change to read as…

41756329079550_page_87 CAPTAIN SAFFORD departed from the meeting. MR. FRIEDMAN asked if anyone wished to examine the retyped version of the report just…

41756329079550_page_88 DR. SINKOV said that this procedure seemed best to him, He. . said he could have the American members of the working groups: of call and…

41756329079550_page_89 ® REE IDiAG71G3. 29 September 1950 MEMORANDUM FOR THE MEMBERS OF THE EXECUTIVE COMMITTEE: Subject: | Tentative Minutes of the Second…

41756329079550_page_9 ” a ~~ REF TD:A67163 @ @ Nr. Friedman Seating arrangement for the Plenary Session, BRUSA Commmication Security. Conference, scheduled for…

41756329079550_page_90 . e REF ID:A67163 BRITISH = UNITED STATES’ COMMUNICATIONS SECURITY CONFERENCE MINUTES OF THE SECOND MEETING OF THE EXECUTIVE COMMITTEE The…

41756329079550_page_91 e FPR PEO. @ ITEM 1. CHAIRMANSHIP OF CUMBINED EXECUTIVE COMMITTEE MR. FRIEDMAN stated, for the record, that the Chairmanship for this…

41756329079550_page_92 F COLONEL cous said that it might be possible to forward the Conference recommendations in two separate parts, letting the Sub-Committee A…

41756329079550_page_93 4, 5. 6. T. 9. 10. 11. ERGTSS @ Puragraph 7e(7} = Change to read as follows: "And similar technical matters." Paragraph 7e, final 3…

41756329079550_page_94 - sg TORSHEREP @ CAPTAIN SAFFORD departed from the meeting. MR. FRIEDMAN asked if anyone wished to examine the retyped version of the…

41756329079550_page_95 @ |S? SPER @ DR. SINKOV said that this procedure seemed best to him. He said he could have the American members of the working groups’ ct…

41756329079550_page_96 ' -gEeReR— i. 26 3. he 5 ; REF ID:A67163 eo e SECRET BRUSA COMSEC CONFERENCE Combined Executive Committee Meeting on 27 September 1950…

41756329079550_page_97 REF ID:A67163 @ @ MR. MILLER inquired as to the arrangements for recording the procesdings of the Conference. WR. FRIEDMAN replied that the…

41756329079550_page_98 eo Fe: r) REF ID:A67163 e FOPSEGREF mim 8? BRITISH = UNITED STATES COMMUNICATIONS SECURITY CONFERENCE MINUTES OF THE Einst MEETING OF THE…

41756329079550_page_99 REF ID:A67163 @ropcrche, @- Q MR. MILLER stated that he was most anxious to get along with the proceedings, ard inquired if it would…