The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 20, 2012
Filed:
Jul. 21, 2000
Raynold M. Kahn, Los Angeles, CA (US);
Gregory J. Gagnon, Torrance, CA (US);
David D. Ha, San Gabriel, CA (US);
Peter M. Klauss, Torrance, CA (US);
Christopher P. Curren, Brentwood, CA (US);
Thomas H. James, Pacific Palisades, CA (US);
Raynold M. Kahn, Los Angeles, CA (US);
Gregory J. Gagnon, Torrance, CA (US);
David D. Ha, San Gabriel, CA (US);
Peter M. Klauss, Torrance, CA (US);
Christopher P. Curren, Brentwood, CA (US);
Thomas H. James, Pacific Palisades, CA (US);
The DIRECTV Group, Inc., El Segundo, CA (US);
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.