o 11e• 1 W£D1lOCDmuJl1 15CBrnW0 7ij CHl W llW U lBl l lWllll Wl aJl g 9 OOaJWfl1tDWfil I PL 86-36 50 USC 3605 1 • I CHARACTER-BUILDING IN 11il PEOPLE ' S REPUBLIC OF CHINA •• • • ft- I • 7 • • • nm1 UERCISE Vera R Filby lf AN OCTOBEij OVERLAP • • • • •• • • •• • • • • • • Jane E Dunn •• •2 0 EO 3 3b 3 PL 86-36 50 usc 3605 e _c EC - iiiiS OOCCIOl Ci C iC Xil4 CO Zhbitb 10 XIELliRli - _ _ 1- I Non - Responsive r Declassified and Appro ved f o r Release by NSA on 03-18-2021 pursuant to E O 13526 1 MDR 109357 I I Non - Responsive • ' I I Non - Responsive IC912 Oct 74 CRYPTOLOG Pa el INllr man u sa z r • 111zz n arm j No n - Responsive li IR' Oct 74 CRYPTOLOG • Page 2 Si llf MtMPJ E MIO cams srr asre mr x I Non - Responsive JECllff 1 Oct 74 • CRYPTOLOG • Page 3 111111' sa sa a comm s saa sm 1112 I Non - Responsive Oct 74 CRYP'IOLOG • Page 4 1 Non - Responsive • Oct 74 • CRYPTOLOG • Page 5 I Non - Responsive I- Oct 74 • CRYPTOLOG • Paae 6 EO 3 3b 3 P L 86-36 50 USC 3605 I PL 86-36 50 use 3605 1 Rl4- TEJt Buv jrM •• rc 1't OPL S R tt USl l ' ' ff1 71fr A _ L •••• • • I · '3-fl3 e - Oct 74 • CRYPTOLOG • Pafe 7 i lif iPOKI ·---- -- - -· - EO 3 3b 3 PL 86-36 50 USC 3605 Jretl lF•·· Oct 74 • CRYPTOLOG • Page 8 li llif iPOlfi I _ • • • Oct 74 • CRYP'IOLOG Page 9 SKIFarBfff EPOL 3 3b 3 l 86-36 50 use 3605 I I EO 3 3b 3 PL 86-36 50 USC 3605 Non - Responsive Thi wltA tM Ut th 4utck tdl '· u e ii u ltt d 6 t illOlfle clat c 6 bowuUe 44 Oct 74 • CRYPTOLOG • Pase 10 ---•e• ·· •-- - ril ' • - -··-- -- - - -- ··-· -- - _I Non - Responsive I 'I' Oct 74 • CRYPTOLOG • Page 11 -------------------- - - - 1 Non - Responsive Oct 74 • CRYPTOLOG • Pa1e 12 - --- - · - - ---- - -• • · - - •- - - - · · - - - Non - Responsive I Oct 74 • CRYPTOLOG • Page 13 • J Non - Responsive 1eHn••••11•1 •••••••••••AL Oct 74 • CRYPTOLOG • Paae 14 __ - w -u 2l% mewrr j 1111 w uz s rrmms mnx I Non - Responsive I I I I J' i t- t ------------------------------------------- I ' · - 1 rer11eNFIMIIM THI EO 3 3b 3 PL 86-36 50 USC 3605 XIICIII A CASI ITUDY IN SPICIAL HHARCN ANALYlli bY VUA •• ULIY i s article is adapted fl'OIII a reportwriting exercise fol'Mrly used in the SIGINT reporting COUJ'H It is presented here as a case study in Ca4INT analysis research and reporting not only for SRAs but also--and even more--for the purpose of showing readers not well acquainted with the SRA field s0111e of its • variety and complexity its frustrations and rewards The message around which it centers and all the research data are authentic Bxcept in the message itself Cyrillic letters have been transliterated into English letters for the pmpose of this article So11e Agency organizational elements and procedures have changed since this was written but the essentials of special research analysis and reporting remain the same and the case described is not at all untypical Here then is a day and then another in the life of an SRA • -- Oct 74 CRYPTOLOG • Page 16 TOrllllll'IMtlM - ---- ---- --- ----- 112 • EO 3 3b 3 _ IMIIM - PL 86-36 50 USC 3605 t I Oct 74 • CRYPTOLOG • Pa1e 17 1• IMIIM ' j I ---- - - - -- - -- - - - - - - -- --------------- ---- ---------- I EO 3 3b 3 L 86-36 50 USC 3605 f8'11ABUMIM Oct 74 • CRYPTOLOG • Pqe 18 fOP 14illl lM1IIA ' • r---------- --- I - Non - Responsive EO 3 3b 3 PL 86-36 50 USC 3605 · · · · po J Cl I' WM •- IEE 117 1111711 Oct 74 • CRYPTOLOG • Page 19 JGP ilUR' IMIIIM - -- -·· - -- I - -· '-- -' _ ------------------------------ u r s to us that many of our readers have never known the joy of reading an overlap or stripping key as it ia at tirBs called Th a basic crypt technique is a lot of fun when conditions are right and something e%ee when they are wrong--as they usually are In the puzzle which begins below and continues on the facing page we have given you all the breaks If you want to try your ingenuity and pencil with eraser there are a few facts you will need to know The messages correctly aligned under the 30-digit key are proverbs or quotations in English from famous authors The beginning and ending of each message is marked by an open or close bracket Literal text of a message is converted to digits by substitution through the mononoroe-dinome matrix shown here ' 6 · 7 0 l M A - i R C D F G B J 4 B 9 P Q 2 S 3 'l' 4 5 N 11C U V W X Y Z 8 9 I L 0 A latter from the top row of the matrix is represented by a single digit a letter or punctuation mark from the other two rows by a dinome Thus 2RS but 42•D and 92•U After the text is converted to digits the message • are enciphered by an additive key 30 digits long repeated as often as necessary to eccolllllO ate all the digits of the text Bach message begins at its own spot in the 30-digit key stream aa indicated by the open bracket and overlap• upon itself and the other massages in the writeout--hence the tena overlap All digits in a given column of the overlap are enciphered by the non-carrying addition of the same key digit 8 3•1 9 6•5 2 3•5 etc · Clues and cribs are scattered around There ia one garble I _ s q 8 3 8 l l 4 8 6 g 3 7 9 2 6 8 4 2 0 9 0 8 8 4 9 1 9 8 7 5 2 8 0 3 0 6 6 6 8 g 7 2 8 5 5 8 0 5 2 6 5 7 3 7 0 3 5 4 2 5 6 2 8 3 5 7 5 6 4 4 0 1 9 0 @' 8 2 0 8 8 8 7 9 l 6 5 8 8 2 6 4 4 8 7 2 4 1 l 6 9 3 3 S 1 2 3 5 9 l 3 8 6 7 2 Oct 74 CRYPTOLOG • Paae 20 I 7 s 9 s 1 9 13 1 6 s s 2 9 9 4 8 1 9 9 9 0 8 8 J ' 4 2 9 2 6 9 7 J 3 0 7 9 0 9 9 7 5 4 9 8 3 5 3 1 4 3 2 3 4 1 4 0 2 7 0 3 5 8 0 4 5 7 7 8 3 2 2 9 OJ 5 3 1 8 9 0 6 3 4 2 4 6 3 3 4 4 0 4 2 3 6 1 4 7 2 7 1 0 g 4 9 1 3 6 6 8 9 1 S 9 7 6 9 l 0 7 7 7 7 9 7 4 0 7 7 3 0 3 3 2 5 6 8 6 3 8 2 0 8 4 7 3 4 g 0 l 7 8 7 9 9 5 8 l 8 0 2 8 2 3 6 2 8 g 4 5 0 7 4 1 5 7 9 1 3 5 0 1 9 4 0 8 6 1 8 2 5 6 1 7 7 0 l 8 1 9 8 3 9 6 6 9 8 9 0 l 4 8 9 g 8 3 7 7 9 7 l 6 9 4 8 7 7 6 0 3 8 0 7 6 8 9 4 2 2 6 9 9 0 0 0 7 9 2 3 3 8 6 3 7 2 9 0 l 3 8 4 0 7 4 8 9 9 6 l 5 l l 4 7 9 1 6 9 6 8 4 2 8 4 4 7 9 0 3 8 9 6 8 4 9 7 3 l 5 l e 7 0 7 6 8 4 6 2 4 5 8 2 8 8 9 6 4 8 4 3 8 0 9 7 4 2 7 3 6 8 6 3 0 7· o 2 8 4 2 6 2 0 2 3 6 l 8 4 0 6 8 0 5 2 0 l 6 2 9 5 3 4 3 4 8 l 1 2 6 2 0 9 9 3 8 0 6 3 8 6 5 0 4 8 1 4 8 6 2 8 3 J 9 7 2 9 7 1 0 9 7 l 6 6 6 9 6 4 2 1 2 4 7 8 5 7 2 9 5 2 8 8 0 6 9 9 2 7 3 2 5 7 5 1 3 6 0 7 9 l s 3 2 l 3 3 l 0 3 8 0 9 7 3 9 2 5 3 3 4 l 7 4 8 2 8 3 s 2 3 3 5 3 9 s 6 9 2 6 0 3 3 1 8 9 5 6 l 8 3 0 6 9 7 S 2 2 3 S 6 l 2 6 5 l 7 8 2 Answers next 1110nth Oct 74 • CRYPTOLOG • Page 21 ___ _ _ - 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