移动多媒体广播中的认证授权策略研究

Study of Authentication and Authorization in Mobile Multimedia Broadcast

针对移动多媒体广播大范围用户认证授权的需求特点,分析了移动多媒体广播中的认证授权特殊性,以及传统的条件接收、数字版权管理认证授权方案在移动多媒体广播中应用存在的问题。提出了移动多媒体广播中的认证授权策略,给出了其基本框架,研究了包括重叠网模型、条件接收与数字版权管理结合、双层条件接收等在内的解决方案。通过与传统的条件接收进行比对,提出的方法更适合移动多媒体广播的大用户量并发认证。

In this paper, according to the requirement of authentication and authorization, the particularities of mobile multimedia broadcast are analyzed. The problems of traditional Conditional Access（CA） and Digital Right Management（DRM） in mobile multimedia broadcast are shown. A new scheme of authentication and authorization for mobile multimedia broadcast is proposed. And then, its framework is given, some kernel technologies are researched, such as the overlapped network model, combination of CA and DRM, and double layers CA. By comparing with the traditional CA system, the proposed scheme is much fiter for authentication and authorization with huge quantities of users in mobile multimedia broadcast.