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. 22, 2016
Filed:
Feb. 10, 2014
International Business Machines Corporation, Armonk, NY (US);
Jeffrey B. Lotspiech, Henderson, NV (US);
INTERNATIONAL BUSINESS MACHINES CORPORATION, Armonk, NY (US);
Abstract
Embodiments of the present invention relate to providing encrypted content to authorized content consumers while providing robust traitor tracing. In one embodiment, a key bundle comprising at least one device key is read. A key block is read. A media key precursor is determined from the key block and the at least one device key. A security program is read. At least one encrypted block key is read. The security program is executed to determine a decrypted block key from the media key precursor and the encrypted block key. Encrypted content is read. The decrypted block key is applied to the encrypted content to obtain decrypted content.