Stallings, William <br/><br/>
Cryptography and network security 

 - 4th ed. 
 - New Delhi  Pearson  2006 
 - xvi,680p.  PB  24cm. 
<br/><br/> includes index 
<br/><br/><label>ISBN: </label>9788177587746 
<br/><br/><label>Dewey Class. No.: </label>005.82  / STA