Code book : the science of secrecy from ancient Egypt to quantum cryptography /
Simon Singh.
- New York : Anchor Books c1999.
- xvii, 411 p. : ill., map ; 20 cm.
Rs.899/- TB 2084/13
Includes bibliographical references (p. 388-393) and index.
9780385495325
Cryptography Data encryption (Computer science)--History.