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REF ID:A63360
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ao eo REF_ID:A63360 @oP boos tes 8 Aside from the much earlier Scytale used by the ancient Greeks, the earliest AS cipher device known to…
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foe ' revolution of the "minute" hand, just as in.a clock. , At-the-elese-of- 6 period pr Ramee ae wow 9° tend amd “porendl .…
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Opes Years REF ID:A63360 sequence, and the mixed alphabets are all different, each bearing an identify- ing letter or number for assembling…
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REF ID:A63360 Sips= whet-wererd: Cipher Device type M-gh, used by the Army, the Navy, the Coast Guard, and the Treasury. A couple of years…
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here is a dissertation on the number of permutations and combinations the Kryha machine affords, written by a German mathematician. All I…
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REF ID:A63360 eed CE he wpe d phadets for usg in enciphermeR\s that is, the alphabets are . a in a fixed sequence \ Such a achine would…
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“Re eos co Beet NS Bees was being built until the #seaai model was completed and ready to be delivered to us. When we finally went to pick…
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nREE of 60 QQ; Gamat ibs FT ' Wald “nada alrout i929 att by-the-Uatted States Army-was.a- deciaine~opn & level higher than my own, and…
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REF ID:A63360 ‘ean-Euzonean-setric weasurementsand tools, -end- we-butlti.an astonishing-number of them--over one hundred and ten thousand,…
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REF ID ) 2363360 When there are, Several messages in depth the 7 a even a A part about this from the 4 COMSEC is that with a solution by)…
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. ars . Per ae : . REF ID:A63360 SLIDES FOR THIRD PERIOD BG ACrdey prota PAGE SLIDE NO. TITLE qT 445 Alberti disk v 45.1 Porta v 45.4 U.S.…
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REF ID:A63360 The next forward step was taken when Hagelin made the printing mechanism 5 an integral part of the machine itself. Here is…
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"Horse thievery." I asked him: "Were you guilty?", whereupon he said: "The jury thought so". It was while he was in jdil, then, that Mr.…
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REF ID:A63360 i b . conneetion-changers~-you.could .take-wires «and rearrange them-as and when you pheased. There is an interesting story…
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REF ID:A63360 eee this mean that you challenge me?" whereupon he said, "Yes". So I said: "I accept." He asked: "Well, what do you want in…
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REF ID:A63360 instance, that the first, the seventh, the ninth letters were the same, what- ary we Ve "S gady wt ever they were; the…
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REF _iDii : A63360 Despite my solution we thought that the Hebern principle was still a ory wet tn ine tern a good one, and,Navy we went…
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CREF, ID+AGd60 rig a Se I-think the principle is still quite safe, especially if the tapes uren't - . overburdened..in_ysage.…
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REF ID: A63360 re Qt = “produced -e hut—ever-and-beyond that the-machine had.a fatal security iy hme xey inmate of tremendous” Iength…
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REF ID:A63360 png eth War with great satisfaction Gh bo ee I might add, in closing that incident, that, to the best of my knowledge, this…
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E-TR-Aesacer- Jars SE end of 1953 we were able 2 /h0 &onvince the aut ities that it would ‘Re all right and finally thé Brit hh were…
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REF ID:A63360 TITLE One-time tape production equipment SIGCUM Unit (external view) SIGCUM Unit (internal view) SIGMEW - Cifax SIGJIP Number…
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REF ID:A63360 the thing, who could service it, and so on, and we saw to it that these rules were strictly enforced. But there came a time…
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. \ . ‘shkide. Here are the rotors--they are exactly ~ \ an the same physically as they were on the commercial nofel, but with different ‘\…
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> cipher machine, using circular key tapes of random characters. Great faith was placed in this machine but it was not put into use until…
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Now we have to say a few words about certain other types of ciphering apparatus. For example, it is necessary to send, with security,…
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REF ID:A63360 ti first, so as not to overload one system beyond the safety limit, and second, so Ray 220 fave tha sane macdunte rr cy fs…
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REF ID:A63360 Fee it 2 ee This-stide shows Ye number of | Hes ographic systems in effect ex—7—Decembey wap get over Too}: 2d IpsLuntsy,…
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REF ID:A63360 rwaetions Det” instances-of this sort every now and thea. By the way, the Japanese were secciey. oop acess ca worried “about…
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REF ID: :A63360 Sani al and commission. Experience has proved thet in the past it has been these iead-weaknesses in the -eryptousystems and…
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the enemy's real attack on the af chines, Bebs~of. ses“there's. pae-other Peasoayitnel. sh Aero tlecnsik gay tren colo to prevent @…
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REF ID:A63360 OT Here's a bine designated the KW-3, now undergoing test. It is an off-line N teleprinter cipher machine™byt it has all the…
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COMMUNICATIONS SECURITY Getilaiei, this period willbe devoted tothe subject of -communications secunity,_hoy.itcan-be-established afd…
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REF ID:A63360 som eee a a fous off the plain text of the messages, whereupon a cipher tape is produced, which \ ma can be put on any…
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coe Next, we have the KY-3, a ciphony or telephone security equipment. It has very high secyrity and excellent quality, and is not a…
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REF ID:A63360 Say perry Had eg pete tf sms = oak mai cra hinie fart ra tara baacke Ag | win WORE Aran Ptr S AV, < : NAD. dd x nue 4V2 a…
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7 . REF i agaieo : wae in a es ge we ons eet on eee one security devices and systems, and on automatic teleprinting systems. The days of…
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Sewers Wath. the-ferezoeing vemarks ~P"briIng-t0" 2 elLOse ty talk on COMINE -antt COMSEC, If there is any last word or impression that I…
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REF ID:A63360 ae have presented for your information, let-me~invite “Fhose of you who care to Ode. prvité de. examine some of my…
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ww important episode of¢ae-war of, the Pe Pacific during World War II, amdé I will preface gon Rot uring DW portticipation we the account…
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REF ID:A63360 DRUK LEE OSE EES They also knew what his air escort would be, ané seam. It was relatively easy to bring about the "accident"…
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se REF _ID:A63360 bod Gate = [as fp rananoto story in this morning's paper has placed our activities in very difficult position. Have…
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Ae officers come out quite openly with statements attributing their defeat to poor COMSEC on their part, and excellent American COMINT and…
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e invention and development of SOT EOE EE, WEAPONS of warfare, old including communication systems, the/so-called “pencil-and-paper…