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:
Jul. 15, 2008
Filed:
Jan. 11, 2002
Ryuta Taki, Kanagawa, JP;
Tomoyuki Asano, Kanagawa, JP;
Tateo Oishi, Saitama, JP;
Yoshitomo Osawa, Kanagawa, JP;
Ryuta Taki, Kanagawa, JP;
Tomoyuki Asano, Kanagawa, JP;
Tateo Oishi, Saitama, JP;
Yoshitomo Osawa, Kanagawa, JP;
Sony Corporation, , JP;
Abstract
A system and method are realized which enables valid use of content by preventing unauthorized use of content which is caused by rewriting rights data. A structure is employed in which rights data including use-restriction information on content and DRM data including an encrypted content key are recorded in a digital data recording medium (media), and in which an integrity check value (ICV) for the DRM data can be stored in a recordable/playable area (protected area) by using only a dedicated IC. EKB distribution is used to execute the tree-structure key distribution to distribute keys for generating ICV-generation verifying keys. In this structure, unauthorized use of content by rewriting of the rights data is prevented.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile