Author: Laurence Dwight Smith
Year: 1943
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9780486202471
048620247X |
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"Those who delight in puzzles can find much to ponder on here," declared Science News Letter of this excellent introduction to cryptography. Concise and simple explanations cover transposition and substitution ciphers, codes, and their solutions. More than 150 problems provide practical applications as well as tests of ingenuity.
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