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Cryptanalysis a Study of Ciphers and Their Solutions
Cryptanalysis a Study of Ciphers and Their Solutions Author:H. F. Gaines 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.