Abstract:VOIP (voice Over Internet Protocol) has many advantages but at the same time it has security threats not encountered in PSTN (Public Switched Telephone Networks).The paper deals with the security of the widely used protocol for signaling. The Session Initiation protocol (SIP) is considered the most used signaling protocol for calls over the internet. Securing SIP is becoming more and more important. This paper focusing on the SIP security mechanisms of authentication, and proposing an authentication model base… Show more
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