589206
9780486200972
Thorough, systematic introduction to serious cryptography, especially strong in modern forms of cipher solution used by experts. Nihilist, grille, U. S. Army, key-phrase, multiple-alphabet, Gronsfeld, Porta, Beaufort, periodic ciphers, and more. Simple and advanced methods. 166 specimens to solve -- with solutions.Gaines, Helen F. is the author of 'Cryptanalysis a Study of Ciphers and Their Solutions' with ISBN 9780486200972 and ISBN 0486200973.
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