Indexation 651.928 : Chiffres. Cryptographie
651 Organisation de bureaux. Techniques du travail de bureauOuvrages de la bibliothèque en indexation 651.928 (2)
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This clear and thorough text also provides you with 166 specimen codes to solve. This edition for the first time also includes solutions. A special appendix includes final letters, sequence charts, diagram, trigram tables, most common words in[...]
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Laurence Dwight Smith, Auteur | New York : Dover publications | Dovers books of recreations, games, stunts, tricks, magic, etc. | 1955After a brief description of the history of secret writing, The reader is introduced to fundamental principales of ciphers transposition and substitution and given an understanding of the various methods of enciphering and deciphering secret m[...]
