发明授权
US08140859B1 Secure storage and replay of media programs using a hard-paired receiver and storage device
有权
使用硬配对的接收器和存储设备安全存储和重放媒体节目
- 专利标题: Secure storage and replay of media programs using a hard-paired receiver and storage device
- 专利标题(中): 使用硬配对的接收器和存储设备安全存储和重放媒体节目
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申请号: US09620833申请日: 2000-07-21
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公开(公告)号: US08140859B1公开(公告)日: 2012-03-20
- 发明人: Raynold M. Kahn , Gregory J. Gagnon , David D. Ha , Peter M. Klauss , Christopher P. Curren , Thomas H. James
- 申请人: Raynold M. Kahn , Gregory J. Gagnon , David D. Ha , Peter M. Klauss , Christopher P. Curren , Thomas H. James
- 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: G06F9/00
- IPC分类号: G06F9/00
摘要:
A method and apparatus for storing and retrieving program material for subsequent replay is disclosed. The method comprises the steps of receiving a data stream comprising the program material encrypted according to a first encryption key, decrypting the program material; re-encrypting the program material according to a second encryption key; and storing the re-encrypted material in a media storage device. The program material is played back by retrieving the re-encrypted material from the media storage device and decrypting the re-encrypted program material. In one embodiment, the second encryption key is derived from metadata describing replay rights. In a further embodiment, the media storage device also stores the second encryption key which has been further encrypted by a key that is unique to the device used to receive the program material.
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