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:
Jan. 23, 2007
Filed:
Dec. 21, 2001
Tomoyuki Asano, Kanagawa, JP;
Yoshitomo Osawa, Kanagawa, JP;
Tateo Oishi, Saitama, JP;
Ryuji Ishiguro, Tokyo, JP;
Ryuta Taki, Kanagawa, JP;
Tomoyuki Asano, Kanagawa, JP;
Yoshitomo Osawa, Kanagawa, JP;
Tateo Oishi, Saitama, JP;
Ryuji Ishiguro, Tokyo, JP;
Ryuta Taki, Kanagawa, JP;
Sony Corporation, , JP;
Abstract
An information processing system and method are disclosed in which information processing is performed in a highly efficient manner using an enabling key block (EKB) on the basis of a tree structure including category subtrees. A key tree is produced so as to include a plurality of subtrees that are grouped in accordance with categories and managed by category entities. An EKB is produced so as to include data produced by selecting a path in the key tree and encrypting an upper-level key in the selected path using a lower-level key in the selected path. The resultant EKB is provided to a device. If a change occurs in state of a category tree capable of processing an EKB identified in the EKB type definition list, a notification of the change in state is sent to an entity that uses the EKB thereby making it possible for an EKB requester to perform processing in accordance with a newest EKB.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile