Ip Telephony Gatekeeper Security System, And Application

With the rapidly development of IP phone applicaton,more and more people pay attention on it and consider it the trend of voice communication. IP phone take advantage of the IP network and computer technology to provide an platform for future multi communication.But because IP network is not secure, the IP phone which base on it has same problem. The security of IP phone is the foundation of its large scale application.H.323 protocol of ITU-T is the mainly archtecture which is use in IP phone. Gatekeeper is the key entity which is for management and security in H.323, so the realization of H.323 security frame in GateKeeper is of important value, and is the key to make sure H.323 IP phone system security.In this paper, at first, analysed the security of H.323 architecture,include H.235 protocol and scheme of IP phone security.Base on it, realized an security system in Gatekeeper,it include authentication,admission control and integrity of H.323 message. And this function can be config flexibily. At last, summarized and gave some suggestion for security on IP phone application.