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:
Jun. 20, 2006
Filed:
Jun. 15, 2000
Tooru Kamibayashi, Chigasaki, JP;
Hisashi Yamada, Yokohama, JP;
Hiroshi Iwasaki, Yokohama, JP;
Masafumi Tamura, Chofu, JP;
Yasuhiro Ishibashi, Ome, JP;
Taku Kato, Kamakura, JP;
Makoto Tatebayashi, Takarazuka, JP;
Shunji Harada, Osaka, JP;
Tooru Kamibayashi, Chigasaki, JP;
Hisashi Yamada, Yokohama, JP;
Hiroshi Iwasaki, Yokohama, JP;
Masafumi Tamura, Chofu, JP;
Yasuhiro Ishibashi, Ome, JP;
Taku Kato, Kamakura, JP;
Makoto Tatebayashi, Takarazuka, JP;
Shunji Harada, Osaka, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
In a mutual authentication method for use between a recording apparatus which records copied contents on a recording medium having an arithmetic processing function, and the recording medium, the method includes a step of storing in the recording medium at least first information which depends on the recording medium, and second information which is to be shared by the recording apparatus in executing mutual authentication with the recording apparatus and depends on the recording medium, and a step of generating by the recording apparatus authentication information used in mutual authentication with the recording medium on the basis of the first information obtained from the recording medium, and executing mutual authentication between the recording apparatus and the recording medium using the generated authentication information and the second information.