在3G系统中,除了传统的语音业务外,还能够处理图像、音乐、视频流等多种媒体形式,提供包括网页浏览、电话会议、电子商务、电子贸易等多种信息服务。因此,第三代移动通信系统不仅仅要满足一般意义上的语音以及数据业务的安全性,还需要为其支持的新业务提供相对的安全性保障措施。所以如何在第三代移动通信系统中保证业务信息的安全性以及网络资源使用的安全性已经成为3G系统中至关重要的问题。 In addition to the traditional voice services, the 3G system can handle various media such as images, music and video streams and provide various information services including web browsing, teleconferencing, e-commerce and e-commerce. Therefore, the third generation mobile communication system not only needs to satisfy the voice and data service security in the general sense, but also needs to provide relative security guarantee for the new services it supports. Therefore, how to ensure the security of service information and the safety of network resource usage in the third generation mobile communication system has become a crucial issue in the 3G system.