Ballad, Bill <br/><br/>
Access Control, Authentication, and Public Key Infrastructure 
Bill Ballad, Tricia Ballad, Erin K. Banks 
 - Sudbury, MA  Jones & Bartlett Learning  2011 
 - xvii, 391p. :ill 
<br/><br/><label>ISBN: </label>9780763791285 
<br/><br/><label>Dewey Class. No.: </label>005 BAL