Stallings, William, <br/><br/>
Cryptography and network security :  Principles and practice /  Textual Documents 
By William Stallings . 
 - 7th ed. 
 - Delhi  Pearson Education  2017 
 - pg766:  21cm. 
<br/><br/><label>ISBN: </label>978-93-325-8522-5 
<br/><br/><label>Subjects--Index Terms: </label>Algebra Cryptography G- Mathematics 
<br/><br/><label>Dewey Class. No.: </label>512