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:
Feb. 02, 2016
Filed:
Apr. 07, 2009
Alain Durand, Rennes, FR;
Marc Joye, Cesson Sevigne, FR;
Mohamed Karroumi, Rennes, FR;
Yan-mei Tang Talpin, Saint Gregoire, FR;
Alain Durand, Rennes, FR;
Marc Joye, Cesson Sevigne, FR;
Mohamed Karroumi, Rennes, FR;
Yan-Mei Tang Talpin, Saint Gregoire, FR;
Thomson Licensing, , FR;
Abstract
A method for distributing content in a content distribution system is disclosed which comprises the steps of: encrypting at a Content Packager a content using a content encryption key to generate an encrypted content; sending the content encryption key to a Licensing Authority; receiving from the Licensing Authority a distribution key containing an encryption of the content decryption key (K) for a given set of authorized devices; creating a secure link between the content encryption key (K) and the content protected by this content encryption key using a signature of the content; and distributing the encrypted content together with the signature of the content. A method for receiving content distributed according to the above-mentioned method in a device able to play back the content is also disclosed where the content signature is checked before any play back of the content.