Turner, Sean. <br/><br/>
Implementing email security and tokens :  current standards, tools, and practices / 
Sean Turner [and] Russ Housley. 
 - Indianapolis :  Wiley,  c2008. 
 - xv,296p. :  ill. ;  25cm. 
<br/><br/> Includes index.  Includes bibliographical references. 
<br/><br/><label>ISBN: </label>9780470254639 (hbk .) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electronic mail systems--Security measures.<br/>Computer security.
<br/><br/><label>LC Class. No.: </label>TK5105.73  / TUR