摘要： 分析了流媒体数字版权保护（DRM）的一般框架及其存在的问题，结合流媒体的特点，提出了一种新的基于三级加密的流媒体DRM模型——时分变码流媒体DRM。介绍了时分变码流媒体DRM的框架、流程，以及时分变码加密机制，并分析了时分变码流媒体DRM的特点。该模型具有很好的安全性、实时性和可升级性。

关键词: 流媒体, 数字版权保护, 数字版权

Abstract: This paper discusses the general framework of existent streaming media digital rights management (DRM) and its deficiency, presents a new model for streaming media DRM by adapting to the property of streaming media. The new model is based on triple level encryption. The new model’s framework, process flow and encryption mechanism are described. The new model’s characteristic is analyzed and the new model is proved to be secure, real-time and upgradeable.

Key words: Streaming media, Digital rights management (DRM), Digital rights