Singh, Simon.
The code book : The secret history of codes and codebreaking / Simon Singh. - London : Fourth Estate, 1999. - xiii, 402 p. : ill., map ; 25 cm.
Includes bibliographical references (p. 388-393) and index.
0385495315 (hardcover)
99035261
Cryptography--History.
Data encryption (Computer science)--History.
Z103 / .S56 1999
652/.8/09
The code book : The secret history of codes and codebreaking / Simon Singh. - London : Fourth Estate, 1999. - xiii, 402 p. : ill., map ; 25 cm.
Includes bibliographical references (p. 388-393) and index.
0385495315 (hardcover)
99035261
Cryptography--History.
Data encryption (Computer science)--History.
Z103 / .S56 1999
652/.8/09