摘要：
The third generation mobile communication system（3G） is a global coverage with the use of the network system,it provides high quality multimedia communication,and it not only supports the traditional voice and data services,also supports the interactive service and distributed services,such as multimedia services,electronic commerce,electronic commerce,Internet banking,and Internet services and other information services.That way all the confidential,sensitive,the privacy of the data transmission quantity will increase greatly,this new business environment for network security system has put forward higher requirements.Therefore,the 3G system besides the traditional voice,data security,also should be able to provide new business to provide the appropriate security features.This paper we elaborated the 3G system security architecture,The detail of the 3G system authentication and key agreement mechanism,and It points out the mechanism in the security loopholes.And we give the solution.At the end of the 3G system authentication and key agreement algorithm design is introduced in this paper.%第三代移动通信系统（3G）是一个在全球范围内覆盖与使用的网络系统,它向用户提供高质量多媒体通信,不仅支持传统的话音与数据业务,还支持交互式业务与分布式业务,如多媒体业务、电子商务、电子贸易、网上银行,以及互联网服务等多种信息服务。这样一来各种机密的、敏感的、隐私的数据传输量会大大增加,这种全新的业务环境便对网络系统的安全性提出了更高的要求。因此,3G系统除了满足传统语音、数据业务的安全性保障之外,还应该能够为其新业务提供相应的安全特征。本文阐述了3G系统的安全体系结构,详细探讨了3G系统的认证和密钥协商机制,指出了此机制在安全性方面存在的漏洞,并给出了解决方案。最后对3G系统认证和密钥协商协议算法的设计进行了介绍。
