随着以软交换为核心的下一代网络的发展，会话初始协-iX(SIP)的安全应用问题显得越来越重要。在介绍SIP协议安

全性特点的基础上，针对其可能受到的安全威胁，讨论了SIP协议的安全机制问题。重点对SIP协议安全机制中的两个主要

方面—— 信今安全与媒体安全做了较为全面的分析。根据分析结果和网络特点，提出了安全机制的应用模型设计方案，并对

方案的具体应用进行了描述，最后指出了应用模型在实际应用中可能存在的问题。-Along with the softswitch as the core of the development of next generation networks, Session Initiation HS-iX (SIP) security applications becoming more and more important. In introducing the SIP protocol security features on the basis of its possible security threats, discussed the SIP security mechanism agreement. Focus on the SIP protocol security mechanisms in the two main aspects- the safety of this letter and the media have done a more comprehensive safety analysis. The results of the analysis and network characteristics of a security mechanism design application model, and specific application programs are described, and finally pointed out the application model in practical application problems that might exist.