Stallings, William  . <br/><br/>
Crytography and network security: principles and practices /  
by William Stallings. 
 - 4th ed /  
 - New Delhi :   Prentice-Hall of India Private Limited ,   2006 
 - xvi, 680p ;  
<br/><br/><label>ISBN: </label>81-203-3018-8 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computer- Network Security
<br/><br/><label>Dewey Class. No.: </label>BV  / P6