Zimmerman <br/><br/>
Cryptography (E-Book)  an introduction 
Zimmerman 
 - USA  2000 Network Associates, Inc. and its Affiliated Companies.  1990 
 - vi.86.p 
<br/><br/>The Basics of Cryptography(Page-11) Phil Zimmermann on PGP(Page-39)   
<br/><br/><label>Subjects--Geographic Terms: </label><br/>E-Book