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

Secure storage and replay of media programs using a hard-paired receiver and storage device
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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