】SIP协议是会话初始协议，因为其自身和应用环境的特点面临着许多安全威胁。论文针对其中一种主要安

全威胁— — 注册劫持，用两种方法实现此种攻击，并实验对带有摘要认证的SIP的注册劫持攻击，最后提出防范注册

劫持攻击的安全机制。-SIP protocol is Session Initiation Protocol, as its own characteristics and application of environment is faced with many security threats. Papers for one of the main security threats-- registered hijacked two ways to achieve such attacks, and experiment with a summary of the SIP certification registration hijacking attacks, the end of the registration to prevent hijacking attacks on security mechanisms.