The code book :
Singh, Simon
The code book : the secret history of codes and code breaking Simon Singh. - 1st ed. - New York : Doubleday, c1999. - xiii, 402 p. : ill., map ; 25 cm.
Includes bibliographical references (p. 388-393) and index.
9780007453085
99035261
Cryptography--History.
Data encryption (Computer science)--History.
Z103 / .S56 1999
652.809 / SIN-C
The code book : the secret history of codes and code breaking Simon Singh. - 1st ed. - New York : Doubleday, c1999. - xiii, 402 p. : ill., map ; 25 cm.
Includes bibliographical references (p. 388-393) and index.
9780007453085
99035261
Cryptography--History.
Data encryption (Computer science)--History.
Z103 / .S56 1999
652.809 / SIN-C