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:
Nov. 15, 2005
Filed:
Nov. 30, 2000
Hideyuki Hirano, Kawasaki, JP;
Seigo Kotani, Kawasaki, JP;
Shinji Hashimoto, Kawasaki, JP;
Kazuhiko Muramoto, Kawasaki, JP;
Hideyuki Hirano, Kawasaki, JP;
Seigo Kotani, Kawasaki, JP;
Shinji Hashimoto, Kawasaki, JP;
Kazuhiko Muramoto, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
Method of data operation facilitating utilization of legitimate users without violating the copyright and literary property of digital content. A part of digital content () is duplicated to create discrete data unit (), and is encrypted with content key (). Content key () and image-compositing information () are encrypted with secret key () to create authorization information (). Content information () is visibly embedded in digital content (). Authorization information-added data unit () in which authorization information () is embedded as invisible information and encrypted discrete data unit information () are composited into composite data (), which is then distributed.