Research About SIP Protocol Security And Implementation Of Evaluation Tool

NGN(Next Generation Network) has become a hot topic recently. The problems of network security and protocol security, quality of service, business model .etc. have been extensively discussed. Among all these problems, network security and protocol security are the basic ones that are needed to be solved.This thesis mainly describes the theme of protocol security. The main tasks are to research and test the security of SIP protocol. After investigating the theories and methods for protocol test, the drafts of security test standard for SIP protocol is presented, and then the design and implementation of the evaluation tool are described. The tool is used for testing the security of the devicesFurthermore, a new test case description language TSD is designed and implemented. The language is simple and the implementation if very efficient. The thought of penetration test is used to design the test cases.The tool is divided into two modules: the control flat and PCO (Point of Control and Observation). The control flat contains six models: users' interface, test script analyzing, the packet generating, test cases executing, judging and communicating, while the PCO achieves a lightweight TCP/UDP/IPv4 stack due to different layers of target protocols.