DRM中流媒体加密密钥切换技术研究与实现  

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

作　　者：李飞[1] 周玉洁[1] 

机构地区：[1]上海交通大学电子信息与电气工程学院,上海200240

出　　处：《计算机工程》2009年第9期142-143,146,共3页Computer Engineering

基　　金：国家自然科学基金创新研究群体资助项目(60521002)

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。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.

关 键 词：数字版权管理 流媒体 内容加密密钥 传输流 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]