Ransome J. F. <br/><br/>
Voice over internet protocol security 

 -  Elsevier  2020 
<br/><br/><label>ISBN: </label>9781555583323 
<br/><br/><label>Subjects--Topical Terms: </label><br/>COMPUTER_SCIENCE_ENGINEERING
<br/><br/><label>Dewey Class. No.: </label>5.822