Abstract. Two highly visible public communication networks are the publicswitched telephone network (PSTN) and the Internet. While they typically provide different services and the...
As current Voice-over-IP (VoIP) systems encourage a direct communication between the callees they are similar in design to peerto-peer (P2P) approaches. Therefore, we introduce a f...
As Voice over IP (VoIP) applications become increasingly popular, they are more and more facing security challenges that have not been present in the traditional Public Switched Te...