Security Analysis of Session Initiation Protocol in IPv4 and IPv6 Based VoIP Network

VoIP is new emerging technology for the delivery of voice communication and multimedia session over the Internet. In VoIP network voice and signaling are multiplexed and travel as normal data inside the IP network. This growing popularity is due to cost saving factor and flexibility of services. SIP is VoIP standard protocol for establish, maintain and terminates voice communication. While VoIP service getting popular, they are also becoming attractive target for attacker for their malicious activities. Due to open nature of SIP protocol implementation that runs over the UDP transport make vulnerable to various threats in VoIP Service. In this paper we mainly concern with different SIP protocol attacks and their impact on the VoIP with and without security mechanisms in IPv4 and IPv6 networks. Based on current security issues and threats our main focus on implementation of attacks and security analysis of SIP protocol layer in both IPv4 and IPv6 network along with their comparison. Then we implement the security mechanism for the SIP protocol over the three different transport layers along with their impact on the VoIP infrastructure. This paper also explains the impact of TLS over the SIP server performance and comparison over the IPv4 network and IPv6 network for better security implementation.