Kahn, David <br/><br/>
Code-breakers : the comprehensive history of secret communication from ancient times to the internet 

 - New York  Scribner  1996 
 - xviii, 1181 p. ; 23.5 cm 
<br/><br/><label>ISBN: </label>9780684831305 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computer sc. Engg.
<br/><br/><label>Dewey Class. No.: </label>652.8  / KAH