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Cryptanalysis
A Study of Ciphers and Their Solution
by Helen Fouche Gaines
Paperback in English, 237 pages — category ciphers
Published by Dover Publications in 1989
I enjoyed reading this book.
Description from the publisher:
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.
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