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:
Dec. 07, 2010
Filed:
Aug. 24, 2001
David Leporini, Paris cedex, FR;
Frederic Dublanchet, Paris Cedex, FR;
Andre Surcouf, Paris Cedex, FR;
Nicolas Gaude, Paris Cedex, FR;
Eric Delaunay, Paris Cedex, FR;
David Leporini, Paris cedex, FR;
Frederic Dublanchet, Paris Cedex, FR;
Andre Surcouf, Paris Cedex, FR;
Nicolas Gaude, Paris Cedex, FR;
Eric Delaunay, Paris Cedex, FR;
Thomson Licensing S.A., Boulogne-Billancourt, FR;
Abstract
A method for transmission and storing of scrambled content in which the scrambled content is transmitted together with encrypted control words, the control words being used for descrambling the scrambled content, transmitting to a receiver/decoder the scrambled content and encrypted control words, said control words being encrypted by an exploitation key (K), decrypting said encrypted control words in a removable security module with an exploitation key (K), said removable security module being received by the receiver/decoder, characterised in that it further includes transmitting usage rules message (URM) to the receiver/decoder (), which usage rules (URM) impose usage constraints on the playback of the content stored on a mass storage device encrypting the decrypted encrypted control words and usage rules messages by a local key (K) to produce encrypted control management messages (CMM) storing said scrambled content and encrypted control management message on the mass storage device of the receiver/decoder.