Descrambler

A descrambler, comprising:

• a first process block adapted to perform cryptographic operations on input information using a unique key to produce a user key;
• a second process block, using the user key, to perform cryptographic operations on incoming information to produce a copy protection key;
• a third process block, using the unique key, to decrypt an encrypted descrambling key, the third process block to recover a descrambling key;
• decryption logic, using the descrambling key, to decrypt encrypted incoming digital content, the decryption logic to decrypt the encrypted digital content to produce digital content in a clear format;
• and
• encryption logic, using the copy protection key, to re-encrypt the digital content in the clear format and produce encrypted digital content for transmission from the descrambler.

A receiver that is adapted to receive and process incoming content for subsequent display, the receiver comprising:

• a memory adapted to store a unique key;
• a plurality of process blocks coupled to the decryption logic and the encryption logic, the plurality of process blocks being adapted to (1) perform cryptographic operations on input information using the unique key to produce a user key, (2) perform cryptographic operations on incoming information using the user key to produce a copy protection key, and (3) decrypt an encrypted descrambling key using the unique key in order to recover a descrambling key;
• decryption logic being adapted to decrypt encrypted incoming digital content using the descrambling key and recover digital content in a clear format, and
• encryption logic being adapted to re-encrypt the digital content in the clear format using the copy protection key so as to produce encrypted digital content for transmission from the descrambler.