06851063 is referenced by 117 patents and cites 8 patents.

A digital video recorder (DVR) is disclosed comprising a unique ID, a hard disk drive (HDD) for storing a plurality of encrypted video programs and an encrypted file system, the encrypted file system comprising a plurality of encrypted file system entries for decrypting the plurality of video programs. The DVR further comprises host circuitry for interfacing with the HDD, the host circuitry comprising a cryptography facility for encrypting plaintext file system entries into the encrypted file system entries stored on the HDD, and for decrypting the encrypted file system entries read from the HDD into plaintext file system entries. The cryptography facility comprises a pseudo-random sequence generator, responsive to the unique ID, for generating a pseudo-random sequence. The cryptography facility further comprises an encoder for combining the pseudo-random sequence with the plaintext file system entries to generate the encrypted file system entries stored on the HDD, and a decoder for combining the pseudo-random sequence with the encrypted file system entries read from the HDD to generate the plaintext file system entries.

Title
Digital video recorder employing a file system encrypted using a pseudo-random sequence generated from a unique ID
Application Number
9/676633
Publication Number
6851063 (B1)
Application Date
September 30, 2000
Publication Date
February 1, 2005
Inventor
Alan P Rice
Santa Ana
CA, US
William B Boyle
Lake Forest
CA, US
Agent
Howard H Sheerin Esq
Milad G Shara Esq
Assignee
Keen Personal Media
CA, US
Keen Personal Technologies
CA, US
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