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. 15, 2006
Filed:
Apr. 18, 2002
Eric M. Foster, Owego, NY (US);
Jeffrey B. Lotspiech, San Jose, CA (US);
Florian Pestoni, Mountain View, CA (US);
Wilfred E. Plouffe, Jr., San Jose, CA (US);
Frank A. Schaffa, Hartsdale, NY (US);
Eric M. Foster, Owego, NY (US);
Jeffrey B. Lotspiech, San Jose, CA (US);
Florian Pestoni, Mountain View, CA (US);
Wilfred E. Plouffe, Jr., San Jose, CA (US);
Frank A. Schaffa, Hartsdale, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method, system and program product for managing a size of a key management block (KMB) during content distribution is provided. Specifically, a first KMB corresponding to a first subtree of devices is received along with content as encrypted with a title key. If a size of the first KMB exceeds a predetermined threshold, a second subtree will be created. A second KMB corresponding to the second subtree of devices will then be generated. The second KMB contains an entry revoking the entire first subtree of devices and, as such, is smaller than the first KMD. Any compliant devices from the first subtree are migrated to the second subtree.