Helen F. Gaines, "Cryptanalysis - A Study of Ciphers and Their Solution"
1989 | English | ISBN: 0486200973 | 237 Pages | PDF | 12 MB
1989 | English | ISBN: 0486200973 | 237 Pages | PDF | 12 MB
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.