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:
Apr. 14, 2015
Filed:
Nov. 19, 2010
Thomas A. Bellwood, Austin, TX (US);
Robert G. Deen, San Jose, CA (US);
Jeffrey B. Lotspiech, Henderson, NV (US);
Matthew F. Rutkowski, Pflugerville, TX (US);
Thomas A. Bellwood, Austin, TX (US);
Robert G. Deen, San Jose, CA (US);
Jeffrey B. Lotspiech, Henderson, NV (US);
Matthew F. Rutkowski, Pflugerville, TX (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
Provided are techniques for the creation and storage of an archive for binding IDs corresponding to a cluster of devices that render content protected by a broadcast encryption scheme. When two or more clusters are merged, a binding ID corresponding to one of the clusters is selected and a new management key is generated. Binding IDs associated with the clusters other than the cluster associated with the selected binding ID are encrypted using the new management key and stored on a cluster-authorized device in a binding ID archive. Content stored in conformity with an outdated binding ID is retrieved by decrypting the binding ID archive with the management key, recalculating an old management key and decrypting the stored content.