Codemaster: secrets of making and breaking codes

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Paladin Press, 1990 - True Crime - 136 pages
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This practical field manual is designed to teach combat and survival professionals, as well as hobbyists, the basic mechanics of enciphering and deciphering messages. Includes everything from the simplest paper-and-pencil ciphers to state-of-the-art computer systems used by governments and militaries.

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Chapter 8
Field Message Systems
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