TY  - BOOK
AU  - Beker, Henry
TI  - Cipher systems: the protection of communications
SN  - 0 471 89192 4
PY  - 1982///
CY  - New York
PB  - John Wiley and sons
KW  - SISTEMAS DE CIFRADO
KW  - CRIPTOGRAFÍA
N1  - Incluye índice: páginas 423-427; Referencias bibliográficas: páginas 407-421; 1. Some early cipher systems -- 2. More recent mechanical cryptographic devices -- 3. A theoretical approach to cryptography -- 4. Practical security -- 5. Linear shift registers -- 6. Non.linear algorithms -- 7. Some block cipher systems -- 8. Applying cipher systems -- 9. Speech security systems -- 10. Public key cryptography
ER  -