Ballad, Bill <br/><br/>
Access Control, Authentication, and Public Key Infrastructure 

 - Sudbury, MA:  Jones & Bartlett Learning,  2011 
 - xvii, 391p. :ill 
<br/><br/><label>ISBN: </label>9780763791285 
<br/><br/><label>Dewey Class. No.: </label>005 BAL