Cryptography and network security: Principles and practice/ 
Stallings, Willidam 
 - 6th ed. 
 - India:  Pearson,  2014. 
 - 680 p. 
<br/><br/><label>ISBN: </label>9332518777 
<br/><br/><label>Dewey Class. No.: </label>005.8  / STA/C