Stallings, William  <br/><br/>
Cryptography and network security: principles and practice /4th ed. 

 - 4th ed. 
 - New Delhi  Pearson  2009 
 - xvi,680 
<br/><br/><label>ISBN: </label>0131873164 
<br/><br/><label>Dewey Class. No.: </label>681.324  / STA