Johnston, Alan B. <br/><br/>
Understanding voice over IP security 
Alan B. Johnston and David M. Piscitello 
 - Boston:  Artech House,  2006. 
 -  xvii, 261p. 
<br/><br/> Hardcopy 
<br/><br/>Includes index 
<br/><br/><br/>eng 
<br/><br/><label>ISBN: </label>101596930500 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Internet telephony-Security measures
<br/><br/><label>Dewey Class. No.: </label>005.8  / JOU