Stallings, William  <br/><br/>
Cryptography and Network Security: Principles and Practice 

 - New Delhi:  Pearson Education,  2015. 
 - 660  ( R14,SH 01). 
<br/><br/><label>ISBN: </label>9789332518773 
<br/><br/><label>Source: </label> Punjab Book  PKR 9541.85 
<br/><br/><label>Dewey Class. No.: </label>005.8