为了在移动网络中运用IP 协议,因特网工程任务组(IETF)制定了Mobile IP 协议。移动IP 技术给人们带来极大便利的同时,也造成了许多安全隐患。本文提出一种基于移动IP 外地代理分层结构的注册方案,该方案对现有外地代理分层结构的注册方案加以改进,使得移动IP快速切换能力得以提高,减少了注册时延,并提高了移动节点注册过程的安全性。 关键词: 移动IP; 认证; 安全 Abstract: Mobile IP is defined by the Internet Engineering Task Force(IETF) in order to make use of IP protocol in mobile network. Mobile IP brings people much convenience but causes many security hidden troubles. A registration scheme based on foreign agent hierarchy of mobile IP is proposed, which improves the current registration scheme, increases the ability of fast handoff, reduces the time delay of authentication and registration, and make the registration of mobile IP more secure. Key word: Mobile IP ; Authentication ; Security