Stallings, William <br/><br/>
Cryptography and Network Security:  Principles and Practice / 
William Stallings 
 - 7th ed. 
 - New Delhi :  Pearson,  2019. 
<br/><br/><label>ISBN: </label>9789332585225 
<br/><br/><label>Dewey Class. No.: </label>005.8