Hook, David <br/><br/>
Beginning Cryptography 

 - New Delhi:  John Wiley,   2005 
 - xxiv, 448  (R 15 SH 1) 
<br/><br/><label>ISBN: </label>9788126506262 
<br/><br/><label>Source: </label> Pak Book  PKR 841.69 
<br/><br/><label>Dewey Class. No.: </label>005.8