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:
Aug. 21, 2012
Filed:
Feb. 22, 2008
Takahiro Yamaguchi, Hyogo, JP;
Masaya Yamamoto, Osaka, JP;
Sanzo Ugawa, Osaka, JP;
Toshihisa Nakano, Osaka, JP;
Kaoru Murase, Nara, JP;
Takahiro Yamaguchi, Hyogo, JP;
Masaya Yamamoto, Osaka, JP;
Sanzo Ugawa, Osaka, JP;
Toshihisa Nakano, Osaka, JP;
Kaoru Murase, Nara, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A content protection data processing system and a playback device determine whether to permit playback of a content recorded in a recording medium, based on a type of the recording medium and a signature type of a signature attached to a program. Additionally, the content protection data processing system and the playback device switch a procedure relating to a digital signature for each signature type of the digital signature, which enables both the protection of the copyright of the content and the efficient manufacturing of commercial ROM media.