HERSHEY, JOHN E <br/><br/>
CRYPTOGRAPHY DEMYSTIFIED  

 - NEW YORK  MCGRAW-HILL  2003 
 - 356 
<br/><br/><label>ISBN: </label>0-07-140638-7 
<br/><br/><label>Dewey Class. No.: </label>621.382 O 03 HER