Singh, Simon <br/><br/>
The code book  the evolution of secrecy form Mary Queen of Scots to quantum cryptography 

 - New York  Doubleday  1999 
 - 402 p. 
<br/><br/> Quality Paperback Book Club, 4/2000 
<br/><br/><label>ISBN: </label>0-965-073330 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cryptography--History<br/>Data encrytion (Computer science)--History