Cryptography
The Science of Secret Writing
by Laurence Dwight Smith
164 pages· 1955· ISBN 9780486202471
About
"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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