![用于流式多媒体内容的权限管理系统](/CN/2006/8/2/images/200680013363.jpg)
基本信息:
- 专利标题: 用于流式多媒体内容的权限管理系统
- 专利标题(英):Rights management system for streamed multimedia content
- 申请号:CN200680013363.2 申请日:2006-03-16
- 公开(公告)号:CN101268651A 公开(公告)日:2008-09-17
- 发明人: B·P·埃文斯 , C·P·斯特姆 , D·罗森斯特恩 , A·D·帕卡 , N·J·方 , E·奥莉维拉
- 申请人: 微软公司
- 申请人地址: 美国华盛顿州
- 专利权人: 微软公司
- 当前专利权人: 微软技术许可有限责任公司
- 当前专利权人地址: 美国华盛顿州
- 代理机构: 上海专利商标事务所有限公司
- 代理人: 陈斌
- 优先权: 11/112,325 2005.04.22 US
- 国际申请: PCT/US2006/009906 2006.03.16
- 国际公布: WO2006/115620 EN 2006.11.02
- 进入国家日期: 2007-10-22
- 主分类号: H04L9/00
- IPC分类号: H04L9/00
A sequence of content keys are shared between a receiver of pieces of digital content and a computing device upon which the content is to be rendered. The receiver encrypts each piece of content according to a corresponding content key in the sequence and forwards the encrypted content to the computing device and the computing device decrypts the encrypted content according to the corresponding content key. The receiver initially transmits to the computing device an initialization digital license with an initial content key (CK0) therein. The receiver and the computing device each derive a new content key (CKx) in the sequence from the initial content key (CK(0)) in the sequence on an as-needed basis and in a coordinated fashion. The initialization license is required only once for the sequence of content keys, and the receiver need not explicitly communicate (CKx) to the computing device for each piece of content.
公开/授权文献:
- CN101268651B 用于流式多媒体内容的权限管理系统 公开/授权日:2011-12-21