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.
Reprint of Elementary Cryptanalysis.
|Availability||Usually ships in 24 to 48 hours|
|Author/Editor||Helen F. Gaines|
|Grade level||5 and Up (ages 10 and up)|
|Dimensions||5 3/8 x 8 1/2|