Super encrypted storage and retrieval of media programs in a hard-paired receiver and storage device
First Claim
1. A method of storing program material for subsequent replay, comprising steps of:
- receiving a data stream comprising the program material encrypted according to a first encryption key and an encrypted first encryption key;
further encrypting the encrypted program material according to a second encryption key;
encrypting the second encryption key according to a third encryption key to produce a fourth encryption key; and
providing the further encrypted program material, the encrypted first encryption key and the fourth encryption key for storage.
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Accused Products
Abstract
A method and apparatus for storing and retrieving program material for subsequent replay is disclosed. The apparatus comprises a tuner, for receiving a data stream comprising encrypted access control information and the program material encrypted according to a first encryption key, the access control information including the first encryption key; a first encryption module, communicatively coupled to the tuner and communicatively coupleable to a media storage device, for further encrypting the encrypted program material according to a second encryption key and for encrypting the second encryption key according to a third encryption key to produce a fourth encryption key; a first decryption module communicatively coupleable to the media storage device, for decrypting the fourth encryption key retrieved from the media storage device using the third encryption key to produce the second encryption key, and for decrypting the further encrypted program material retrieved from the media program device to produce the encrypted program material; a conditional access module communicatively coupled to the first decryption module, for decrypting the encrypted access control information to produce the first encryption key; and a second decryption module, for decrypting the program material using the first encryption key.
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Citations
31 Claims
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1. A method of storing program material for subsequent replay, comprising steps of:
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receiving a data stream comprising the program material encrypted according to a first encryption key and an encrypted first encryption key; further encrypting the encrypted program material according to a second encryption key; encrypting the second encryption key according to a third encryption key to produce a fourth encryption key; and providing the further encrypted program material, the encrypted first encryption key and the fourth encryption key for storage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An apparatus for storing program material for subsequent replay, comprising:
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a receiver, for receiving a data stream comprising the program material encrypted according to a first encryption key and an encrypted first encryption key; a first encryption module, for further encrypting the encrypted program material according to a second encryption key and for encrypting the second encryption key according to a third encryption key to produce a fourth encryption key; a first decryption module, for decrypting the fourth encryption key using the third encryption key to produce the second encryption key, and for decrypting the further encrypted program material to produce the encrypted program material; a conditional access module, for decrypting the encrypted first encryption key to produce the first encryption key; and a second decryption module, for decrypting the program material using the first encryption key. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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20. An apparatus for storing program material for subsequent replay, comprising:
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means for receiving a data stream comprising the program material encrypted according to a first encryption key and an encrypted first encryption key; means for further encrypting the encrypted program material according to a second encryption key; means for encrypting the second encryption key according to a third encryption key to produce a fourth encryption key; and means for providing the further encrypted program material, the encrypted first encryption key and the fourth encryption key for storage. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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Specification