Secure storage and replay of media programs using a hard-paired receiver and storage device
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Accused Products
Abstract
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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Citations
56 Claims
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1-33. -33. (canceled)
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34. A method of storing program material for subsequent replay, comprising the steps of:
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receiving a data stream comprising program material encrypted according to a first encryption key and metadata including information describing replay rights for the program material;
decrypting the program material;
re-encrypting the decrypted program material according to a second encryption key;
encrypting the second encryption key and the metadata according to a third encryption key to produce a fourth encryption key; and
storing the re-encrypted program material in a media storage device. - View Dependent Claims (35, 36, 37, 38, 39, 40, 41)
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42. A receiver for storing program material for subsequent replay, comprising:
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a tuner, for receiving a data stream comprising encrypted access control information, metadata having information describing replay rights for the program material, and the program material encrypted according to a first encryption key, the access control information including the first encryption key;
a conditional access module, communicatively coupleable to the tuner, for decrypting the encrypted access control information to produce the first encryption key;
a first decryption module, communicatively coupled to the tuner and communicatively coupleable to the conditional access module, for decrypting the program material using the first encryption key;
an encryption module, communicatively coupled to the first decryption module and communicatively coupleable to a media storage device, for re-encrypting the decrypted program material according to a second encryption key and for encrypting the second encryption key and the metadata according to a third encryption key to produce a fourth encryption key;
a second decryption module, communicatively coupleable to the media storage device, for decrypting the fourth encryption key to produce the second encryption key and the metadata using the third encryption key, and for decrypting the re-encrypted program material using the second encryption key according to a comparison between the decrypted metadata and other data. - View Dependent Claims (43, 44, 45, 46)
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47. A method of storing program material for subsequent replay, comprising the steps of:
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receiving a data stream comprising program material encrypted according to a first encryption key and metadata including information describing replay rights for the program material;
decrypting the program material;
re-encrypting the decrypted program material according to a second encryption key derived at least in part from the metadata;
encrypting the second encryption key according to a third encryption key to produce a fourth encryption key; and
storing the re-encrypted program material in a media storage device. - View Dependent Claims (48, 49, 50, 51, 52)
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53. A receiver for storing program material for subsequent replay, comprising:
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a tuner, for receiving a data stream comprising encrypted access control information, metadata having information describing replay rights for the program material, and the program material encrypted according to a first encryption key, the access control information including the first encryption key;
a conditional access module, communicatively coupleable to the tuner, for decrypting the encrypted access control information to produce the first encryption key;
a first decryption module, communicatively coupled to the tuner and communicatively coupleable to the conditional access module, for decrypting the program material using the first encryption key;
an encryption module, communicatively coupled to the first decryption module and communicatively coupleable to a media storage device, for re-encrypting the decrypted program material according to a second encryption key generated at least in part from the metadata and for encrypting the second encryption key according to a third encryption key to produce a fourth encryption key; and
a second decryption module, communicatively coupleable to the media storage device, for decrypting the fourth encryption key to produce the second encryption key using the third encryption key, and for decrypting the re-encrypted program material using the second encryption key. - View Dependent Claims (54, 55, 56)
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Specification