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 (CW) 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 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.

主权项

1. A method of storing program material for subsequent replay, comprising the steps of:
receiving, in a device, a data stream comprising program material encrypted according to a first encryption key for the program material;
decrypting, in the device, the program material;re-encrypting, in the device, the decrypted program material according to a second encryption key derived at least in part from metadata describing media program replay rights;encrypting, in the device, the second encryption key according to a third encryption key to produce a fourth encryption key; andstoring the re-encrypted program material in a media storage device.