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:
Mar. 05, 2013
Filed:
Dec. 31, 2009
Robert Glenn Deen, San Jose, CA (US);
Hongxia Jin, San Jose, CA (US);
Sigfredo Ismael Nin, Morgan Hill, CA (US);
Dulce B. Ponceleon, Palo Alto, CA (US);
Robert Glenn Deen, San Jose, CA (US);
Hongxia Jin, San Jose, CA (US);
Sigfredo Ismael Nin, Morgan Hill, CA (US);
Dulce B. Ponceleon, Palo Alto, CA (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
According to one embodiment of the present invention, a system, method, and computer program product is provided for rebinding title keys in clusters of devices with distinct security levels in broadcast encryption systems. The method includes receiving a new management key and unbinding an encrypted title key with a previously used management key, the title key having a security class and residing in a title key block for a device having a security class, the device being in a cluster of devices including devices having a plurality of security classes. If the device security class is lower that the title key security class, the unbound title key is partially rebound with the new management key. the partially rebound title key is then saved in the title key block for the device.