TY  - BOOK
AU  - Singh, Simon
TI  - The code book : : the evolution of secrecy from Mary Queen of Scots to Quantum Criptography / 
SN  - 038549531
PY  - 1999///
CY  - New York : 
PB  - Doubleday
KW  - INFORMATICA
KW  - SEGURIDAD INFORMATICA
KW  - CRIPTOGRAFIA
KW  - SISTEMAS DE ESCRITURA SECRETA
KW  - MARY, QUEEN OF SCOTS
ER  -