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:
Dec. 28, 2010
Filed:
Dec. 15, 2004
Content distribution server, key assignment method, content output apparatus, and key issuing center
Masao Nonaka, Osaka, JP;
Yuichi Futa, Osaka, JP;
Motoji Ohmori, Osaka, JP;
Shigeru Yamada, Osaka, JP;
Tetsuya Inoue, Osaka, JP;
Yoji Kumazaki, Aichi, JP;
Masao Nonaka, Osaka, JP;
Yuichi Futa, Osaka, JP;
Motoji Ohmori, Osaka, JP;
Shigeru Yamada, Osaka, JP;
Tetsuya Inoue, Osaka, JP;
Yoji Kumazaki, Aichi, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A content distribution system distributes contents. The content distribution system includes a key issuing center, a server, eight output apparatuses, and a communication path that connects them to each other. The key issuing center and each of the output apparatuses are previously given an individual key shared between them. For example, the key issuing center shares individual key IKa with an output apparatus, individual key IKb with an output apparatus, and individual key IKh with an output apparatus.