Garfinkel, Simson <br/><br/>
PGP : pretty good privacy 

 - O'reilly & associates, Sebastopol  1995 
 - xxiii, 393 
<br/><br/><label>ISBN: </label>1-56592-098-8 
<br/><br/><label>Dewey Class. No.: </label>384.648 Gar