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A History of U. S. Communications Security (Volumes I and Ii);1973

By: David G. Boak

...e traditional defini­ tion of them is: Code: "A substitution cryptosystem in which the plaintext elements are primarily words, phrases, or sentences, ... ...locic clouary baa defiDed a code in terms of the meaning-or meaningfulneu-oftheUDderl~ingteztual elements. I wouldn't push the diatinction too far-it ... ...n old-fashioned mimlg device is a bank of magnet-actuated relays that open and close to form the elements of teletypewriter characters being processed... ...• • • • • • '. • • • • • • • • • CONFIBBNTIAt. te) 8PSEC is slowly beiDa iDstitutiooaUzed. OPSEC elements llJC establisMd in the JCS and at most Unifi... ...inefrective. Notbins brouBht tbis home more persuasively tban the Vietnam experience. MonitoriDl elements of all four Services demonstrated the vulner... ...ss. The trouble was tbat there was no other Government Apncypre~ to accept such a role. The Army Chemical Corps bad provided the orilinal pyrotcebDic ... ... on. One such CIIe iD'OMd In OpeJ8tional T.S. key lilt beJna examined for latent prints in In S2 chemical lab. When the cloculDCllt W8I placed on a be...

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