Farideh Barghi - Dept. of Computer Engineering Imam Reza University of Mashhad,Mashhad, Iran
Mohammad Hossein Yaghmaee Moghadam - Dept. of Engineering,Ferdowsi University of Mashhad Mashhad, Iran
Hossein Khosravi Roshtkhari - IP-PBX Laboratory,Ferdowsi University of Mashhad Mashhad, Iran

VoIP is a promising technology for voice transmission on IP-based networks and it has many advantages over PSTN. One of the most important threats inthese networks is unsolicited bulk calls, known as SPIT (Spam over Internet Telephony). The aim in this paper is to present this topic, a survey on detection techniques and anti-SPIT mechanisms. We propose an Anti-SPIT mechanism which is based on calculation of reputation using analysis of behaviorscompared between normal users and SPITTERs for allow or block calls. Both the Service Provider and the Callee haverole in the detection process. Also call lists will be updated in time.

component; VoIP; SPIT; SIP; PSTN;reputation; Caller; Callee; SPITTER