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中文摘要：
广播加密作为一种将数据内容通过广播信道安全地分发给合法用户的安全机制,目前在付费电视、视频会议、无线传感网络等方面得到了广泛的应用。密钥存贮量、通信开销和计算开销是评价广播加密方案性能的主要指标。介绍了广播加密方案的发展和研究现状;对各类广播加密方案的基本原理、特点进行了阐述,并对方案的性能和应用进行了比较和总结;重点研究了其中的公钥广播加密方案,指出了由于公钥广播加密方案不需要信任中心,并且具有任何一个用户都可以广播数据的特点,在无线传感器网络方面有着很大的应用前景。
英文摘要：
Broadcast encryption provides a convenient way to distribute digital content to subscribers over an insecure broadcast channel.It has been applied to various applications such as satellite TV subscription services,audio/video,wireless sensor networks,etc.The efficiency of a broadcast encryption scheme is mainly measured by three parameters：length of transmission messages,users＇ storage,and computational overhead.In this paper the current research and development of broadcast encryption schemes are introduced.Mechanisms and characteristic of various broadcast schemes are described,performances of schemes are compared and application scenarios are discussed.The application prospect of public-key broadcast schemes in wireless sensor network is pointed out lastly.
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