SeCReT: A Security Framework for Enhancing Chain of Response Trust in Session Initiation Protocol

With the introduction of Voice over IP (VoIP) for replacing the traditional circuit switched infrastructure for telephony services, many relevant security concerns have been raised for integrating IP Telephony into the existent applications and system infrastructure. One of the critical concerns is how to enhance authentication and authorization among the propagation parties per call session for blocking identity spoofing and preventing various attacks in the convergent communication systems.