| Titre : |
Cryptography : the science of secret writing |
| Type de document : |
texte imprimé |
| Auteurs : |
Laurence Dwight Smith, Auteur |
| Editeur : |
New York : Dover publications |
| Année de publication : |
1955 |
| Collection : |
Dovers books of recreations, games, stunts, tricks, magic, etc. |
| Importance : |
164 p. |
| Présentation : |
ill. |
| Format : |
20 cm. |
| ISBN/ISSN/EAN : |
978-0-486-20247-1 |
| Note générale : |
La page de couv. porte en plus : "History and modern use of codes and ciphers, togather with 151 problems and their solutions. Index |
| Langues : |
Anglais (eng) |
| Mots-clés : |
Cryptography
Ciphers
Cryptographie
Chiffres (cryptographie) |
| Index. décimale : |
651.928 Chiffres. Cryptographie |
| Résumé : |
After 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 messages. The author covers geometrical patterns, route transcription, under substitution, he treats mixed cipher systems, signale-alphabet and polyalphabetical substitution, mechanical devices, the vigenère system, etc. |
| Note de contenu : |
au sommaire :
1. Secret Weapon No. One.
2. The history of secret writing.
3. Transposition ciphers.
4. Substitution ciphers.
5. Cryptanalysis.
6. Problems.
7. Solutions. |
Cryptography : the science of secret writing [texte imprimé] / Laurence Dwight Smith, Auteur . - New York : Dover publications, 1955 . - 164 p. : ill. ; 20 cm.. - ( Dovers books of recreations, games, stunts, tricks, magic, etc.) . ISBN : 978-0-486-20247-1 La page de couv. porte en plus : "History and modern use of codes and ciphers, togather with 151 problems and their solutions. Index Langues : Anglais ( eng)
| Mots-clés : |
Cryptography
Ciphers
Cryptographie
Chiffres (cryptographie) |
| Index. décimale : |
651.928 Chiffres. Cryptographie |
| Résumé : |
After 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 messages. The author covers geometrical patterns, route transcription, under substitution, he treats mixed cipher systems, signale-alphabet and polyalphabetical substitution, mechanical devices, the vigenère system, etc. |
| Note de contenu : |
au sommaire :
1. Secret Weapon No. One.
2. The history of secret writing.
3. Transposition ciphers.
4. Substitution ciphers.
5. Cryptanalysis.
6. Problems.
7. Solutions. |
|  |
651 Organisation de bureaux. Techniques du travail de bureau
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