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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Anbieter: GridFreed, San Diego, CA, USA
paperback. Zustand: New. Artikel-Nr. 300-01033
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