Importance

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Abstract

According to one embodiment of the invention, the descrambler IC comprises a local memory to store a unique key and a plurality of process blocks. A first process block is adapted to perform cryptographic operations on input information using the unique key to produce a user key. A second process block is adapted to perform cryptographic operations on incoming information using the user key to produce a copy protection key while a third process block uses the unique key to decrypt an encrypted descrambling key and recover the descrambling key. The decryption logic uses the descrambling key to decrypt encrypted incoming digital content and produce digital content in a clear format. The encryption logic uses the copy protection key to re-encrypt the digital content in the clear format and produce encrypted digital content for transmission from the descrambler.

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First Claim