Stallings, William, <br/><br/>
Cryptography and network security :  principles and practice / 
William Stallings 
 - Seventh Edition 
 - xviii, 748 pages :  illustrations ;  24 cm. 
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>9780134444284 0134444280 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computer networks--Security measures<br/>Data encryption (Computer science)<br/>Coding theory<br/>Computer security