I -------r I iEl• I PL 86-36 50 USC 3605 1 R lll VOl JllJ iJ b fJCBl JWOV OOWCB YlD U l llsl lWl lls l l Wl3alfill3 f OOalW ta Wfil I Non - Responsive r 1 r - l n mm • 1 XN XPPROXdl to cAttsitA XAlt lsis • • • • • iliilu l laclson 1 TIIII 11 IUJ IWIT 11119 HHI 118M'8• 11 U t•l• W l T8P 111• 19 Declassified by NSA 03-01-2021 pursuant to E O 13526 MDR Case 109355 I cl llt• EO 3 3b 3 PL 86-36 50 USC 3605 ALYSIS 11 WL iA• J JACKSON Pl According to Mr C G Garofalo fomer significants stem characteristics and of chief of Pl4 who is the individual most rephenomena useful in analysis Several standard sponsible for the solution of a nWllber of tar- forms are a'failable for this purpose • get callsign systems over the past JO years the first step you should take when faced with the job of solvi ng a new and complex callsign system is to go on two weeks annual leave Although this may seem to be a rather unorthodox approach it is mentioned in order to emphasize the fact that it is highly unlikely that sound analytic conclusions about a call sign system can be reached on only a sull volume of intercepted traffic Mr Garofalo points out some basic requirements which must be met during these early weeks before analvt1c Assuming that the system is not illUTiedi oro2ress can be made 1 ately obvious the initial objective is to determine what tYJ e it is • ---- -------- •The better either you or the team does on continuity the easier and 1110re successful your callsign analysis is likely to be In addition to the requirement of continuity for successful analysis another is that of complete openmindedness in the approach to the problem no idea no suggestion should be dismissed as being implausible Remember Aristotle said that a likely impossibility is always preferable to an unconvincing possibility Probably the best approach to callsign study after a number of callsign continuities are available is to arrange the callsigns in a form which will facilitate the recognition of Dec 74 • CRYPTOLOG • Page 7 SKRBS98U Dec 74 • CRYPTOLOG • Page 8 XCICf JFGK EO 3 3b 3 PL 86-36 50 USC 3605 EO 3 3b 3 PL 86-36 50 use - - • In forthcominf issues of CRYPTOLOG it is expected that one or more exaiiples of the ap plication of the foregoing approach will presented • be LETI'ER ro nm EDITOR 'Jb the Editor CRYPTOLOG Magadne The article in the Septel lber issue COMINT Analysis orl 1s of great interest but may I comment on this article - t· by Derek Craig Mr Craig's analysisl was a valuable piece of reportage and I personally enjoyed reading it and learned a lot from it Thank you for a very fine new magazine Name withheld by request Dec 74 CRYP'IULOG • Page 9 111 s•e • 3605