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计算机工程 ›› 2009, Vol. 35 ›› Issue (9): 142-143,. doi: 10.3969/j.issn.1000-3428.2009.09.049

• 安全技术 • 上一篇    下一篇

DRM中流媒体加密密钥切换技术研究与实现

李 飞,周玉洁   

  1. 李 飞,周玉洁
    (上海交通大学电子信息与电气工程学院,上海 200240)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2009-05-05 发布日期:2009-05-05

Research and Realization of Encryption Key Switch Technology for Stream Media in DRM

LI Fei, ZHOU Yu-jie   

  1. (School of Electronic Information and Electrical Engineering, Shanghai Jiaotong University, Shanghai 200240)
  • Received:1900-01-01 Revised:1900-01-01 Online:2009-05-05 Published:2009-05-05

摘要: 针对数字版权管理(DRM)系统中流媒体的内容加密密钥不易更换的问题和基于OMA DRM 2.0规范与ISO13818-1 MPEG 2 TS标准框架,提出提前下发期、密钥过渡期及切换时间窗的机制和严密的内容加密密钥切换时序流程,实现流媒体内容加密密钥平滑切换,提高DRM系统安全性,不影响用户正常收看流媒体节目。

关键词: 数字版权管理, 流媒体, 内容加密密钥, 传输流

Abstract: Content Encryption Key(CEK) for stream media in DRM system is difficult to change, which is necessary from the security point. Based on OMA DRM 2.0 specification and ISO138181, MPEG 2 TS standard, a new technology for CEK switch is developed, which is implemented by switch preparation stage, key transition stage, key switch widow and rigidly accurate procession for key switch. By the new technology, CEK for steam media is switched smoothly and security of DRM system is improved without the influence to user watching.

Key words: Digital Right Management(DRM), stream media, Content Encryption Key(CEK), Transport Stream(TS)

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