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:
Sep. 15, 2009
Filed:
May. 02, 2005
Raynold M. Kahn, Los Angeles, CA (US);
David D. Ha, San Gabriel, CA (US);
Thomas H. James, Pacific Palisades, CA (US);
Peter M. Klauss, Torrance, CA (US);
Raynold M. Kahn, Los Angeles, CA (US);
David D. Ha, San Gabriel, CA (US);
Thomas H. James, Pacific Palisades, CA (US);
Peter M. Klauss, Torrance, CA (US);
The DIRECTV Group, Inc., El Segundo, CA (US);
Abstract
A method, apparatus, and article of manufacture provide the ability to process digital media content. A secret key (Ka) is obtained and encrypted into an authorization key message (AKM) message. One or more entitlement keys (Ke) are then obtained and encrypted using the secret key (Ka) as an encryption key into an entitlement management message (EMM). One or more media content encryption keys (Kc) are obtained and encrypted using one or more of the entitlement keys (Ke) as encryption keys into an entitlement control message (ECM). Digital media data content (Dc) is then obtained and encrypted using the one or more media content encryption keys (Kc). The AKM, EMM, ECM, and encrypted digital media data content are then delivered to a set-top box that is configured to provide digital media services with the content.