Singh, Simon <br/><br/>
The Code Book :   the secret history of codes and code-breaking  
by Simon Singh 
 - New York :  Fourth Estate;  c1999. 
 - xvii, 411 p. 
<br/><br/><label>ISBN: </label>97818570288998 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Quantum Cryptography
<br/><br/><label>Dewey Class. No.: </label>652.8  / SIN