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:
Mar. 11, 2008
Filed:
Aug. 27, 2002
Toru Kambayashi, Chigasaki, JP;
Koichiro Akiyama, Naka-gun, JP;
Shuichi Tsujimoto, Yokohama, JP;
Kazuo Sumita, Yokohama, JP;
Hideki Hirakawa, Yokohama, JP;
Toshihiro Sugaya, Kitasoma-gun, JP;
Toru Kambayashi, Chigasaki, JP;
Koichiro Akiyama, Naka-gun, JP;
Shuichi Tsujimoto, Yokohama, JP;
Kazuo Sumita, Yokohama, JP;
Hideki Hirakawa, Yokohama, JP;
Toshihiro Sugaya, Kitasoma-gun, JP;
Kabushiki Kaisha Toshiba, Kawasaki-shi, JP;
Abstract
An information recording apparatus comprises an encryption section encrypting contents information and also a license condition referred to to limit use of the contents information and a decoding key for decoding the encrypted contents information to generate license information, and a recording section recording the encrypted contents information and the generated license information on a recording medium. An information reproducing apparatus comprises a decoder unit decoding the license information recorded on the recording medium using a second decoding key for decoding the license information and deciding on the basis of the license condition contained in the decoded license information whether the contents information can be used. If it is decided that the contents information can be used, the encrypted contents information recorded on the recording medium is decoded using the first decoding key contained in the decoded license information.