Communications and Cryptography  Two Sides of One Tapestry 
ed by Richard E Blahut and Daniel J Costello et. al. 
 - Boston  Kluwer Academic Publishers  1994 
 - xvi, 481p 
<br/><br/><label>ISBN: </label>0792394690 
<br/><br/><label>Dewey Class. No.: </label>005.82  / N94