William Stallings <br/><br/>
Cryptography and Network Security   Principles and Practice  
William Stallings 
 - 5th ed.  
 - New Delhi   Pearson   2011 
 - 743 p.  Pb. 
<br/><br/><label>ISBN: </label>9788131761663 
<br/><br/><label>Dewey Class. No.: </label>005.82