发明授权
US07590243B2 Digital media conditional access system for handling digital media content
有权
用于处理数字媒体内容的数字媒体条件访问系统
- 专利标题: Digital media conditional access system for handling digital media content
- 专利标题(中): 用于处理数字媒体内容的数字媒体条件访问系统
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申请号: US11119712申请日: 2005-05-02
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公开(公告)号: US07590243B2公开(公告)日: 2009-09-15
- 发明人: Raynold M. Kahn , David D. Ha , Thomas H. James , Peter M. Klauss
- 申请人: Raynold M. Kahn , David D. Ha , Thomas H. James , Peter M. Klauss
- 申请人地址: US CA El Segundo
- 专利权人: The DIRECTV Group, Inc.
- 当前专利权人: The DIRECTV Group, Inc.
- 当前专利权人地址: US CA El Segundo
- 主分类号: H04N7/167
- IPC分类号: H04N7/167
摘要:
A method, apparatus, and article of manufacture provide the ability to process digital media content. A secret key (Ka) is obtained and encrypted into an authorization key message (AKM) message. One or more entitlement keys (Ke) are then obtained and encrypted using the secret key (Ka) as an encryption key into an entitlement management message (EMM). One or more media content encryption keys (Kc) are obtained and encrypted using one or more of the entitlement keys (Ke) as encryption keys into an entitlement control message (ECM). Digital media data content (Dc) is then obtained and encrypted using the one or more media content encryption keys (Kc). The AKM, EMM, ECM, and encrypted digital media data content are then delivered to a set-top box that is configured to provide digital media services with the content.
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