Singh, Simon  <br/><br/>
The Code Book :   the secret history of codes and code-breaking 
by Simon Singh 
 - London :  HarperCollins Publishers,  2000. 
 - ix, 402 p. 
<br/><br/><label>ISBN: </label>9781857028898 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Quantum Cryptography
<br/><br/><label>Dewey Class. No.: </label>652.8  / SIN