Forouzan, Behrouz A <br/><br/>
Cryptography and network security 

 - New Delhi  Tata McGraw Hill  2008 
 - xxvi, 721p.;  
<br/><br/><label>ISBN: </label>70660468 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computer security<br/>Cryptography<br/>Data encription standard<br/>Digital signature<br/>Mathematics -- cryptography<br/>Network security<br/>pgp) <br/>Pretty good privacy(<br/>Symmetric-key ciphers -- modern and tratitional