SIP协议注册劫持攻击的研究

Session Initiation Protocol(SIP) is widely used in NGN and IMS based on it's ease usability,flexibility and extensibility. It is a text-based protocol transported by IP network, and quite vulnerable to simulating and tampering by attacker.There occures more and more SIP attack methods. This paper mainly focus on one classic attack type that is registration hijack attack. The detail analysis of this attack is given first;then the attack experiment is realized;at last some tips to guard the attack are also proposed. It is hopeful that this paper will contibute to the research on the security improvement of SIP.