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:
Aug. 04, 2009
Filed:
Aug. 01, 2003
Jason Cahill, Carnation, WA (US);
Pavel Kouznetsov, Sammamish, WA (US);
Kevin Brown, Carnation, WA (US);
Lauren Antonoff, Seattle, WA (US);
Marco Demello, Redmond, WA (US);
Peter David Waxman, Bellevue, WA (US);
Scott Cottrille, Sammamish, WA (US);
Michael Selhorn, Seattle, WA (US);
Jason Cahill, Carnation, WA (US);
Pavel Kouznetsov, Sammamish, WA (US);
Kevin Brown, Carnation, WA (US);
Lauren Antonoff, Seattle, WA (US);
Marco DeMello, Redmond, WA (US);
Peter David Waxman, Bellevue, WA (US);
Scott Cottrille, Sammamish, WA (US);
Michael Selhorn, Seattle, WA (US);
Microsoft Corporation, Redmond, WA (US);
Abstract
A method is disclosed for rendering content encrypted according to a cryptographic key, where the content has corresponding rights data including a decryption key (KD) for decrypting the encrypted content, and where (KD) in the rights data is encrypted according to a public key of a rights management (RM) server (PU-RM) to result in (PU-RM(KD)). The RM server normally delivers (KD) within a license, but upon being decommissioned can no longer issue such license. In the method, a notification is received that the RM server has been decommissioned, and thereafter an attempt is made to render a piece of content. Such content is determined to be protected to the decommissioned RM server, and a request is sent to the decommissioned RM server for the content key (KD) for the content rather than any license. Thereafter (KD) is received from the decommissioned RM server.