Porter, Thomas <br/><br/>
How to cheat at VoIP security 

 - Rockland  Syngress Publishing  2007 
 - xvi, 367p.  
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label>9781597491693 
<br/><br/><label>Subjects--Topical Terms: </label><br/>IP telophony<br/>Skype security<br/>VoIP communication systems<br/>VoIP protocols<br/>VoIP security