Study On Safty Mechanism For Registering Of User In The Ip Multimedia Subsystem Network

In this paper, conducted by CMCC's key projects-IMS (IP Multimedia Subsystem) test network construction, writer described the safety threats and preventing ways during the access of end-users to IMS core network,and originally gave the security evaluation model about it.Finally the writer tested and checked the Shanghai Mobile's IMS testing network,got the self-conclusion about it.The paper firstly analyzed the various typical scene of security threats and the principles and prevention mechanisms,measures of them,during the access of end-users to P-CSCF and the IMS core control layer in the registration process. And thus sum established the user-registration security evaluation model consisting of three levels of the IP network layer Security, SIP application layer security and user management security. Finally, according to the model, for further structure, gave a comprehensive safety evaluation and reinforcement to the test IMS network of Shanghai Mobile.Beside that, it also gave some useful discussion of the IMS network's further safety evaluation and maintenance for the post for reference.