Barr, Thomas H. <br/><br/>
Invitation to cryptology / 
Thomas H. Barr. 
 - Upper Saddle River, NJ :  Prentice Hall,  2002. 
 - xii, 396 p. 
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>0-13-088976-8 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cryptology<br/>Mathematics