By Helen F. Gaines

ISBN-10: 0486200973

ISBN-13: 9780486200972

Thorough, systematic advent to severe cryptography, particularly powerful in smooth sorts of cipher resolution utilized by specialists. Nihilist, grille, U. S. military, keyword, multiple-alphabet, Gronsfeld, Porta, Beaufort, periodic ciphers and extra. uncomplicated and complex tools. 166 specimens to solve—with ideas.

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Cryptanalysis by Helen F. Gaines

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