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:
Sep. 18, 2007
Filed:
Feb. 27, 2003
Shingo Miyazaki, Fuchu, JP;
Naoki Endo, Fuchu, JP;
Takehisa Kato, Kunitachi, JP;
Daigo Yoshii, Fuchu, JP;
Koichi Noguchi, Yokohama, JP;
Hideo Shimizu, Kawasaki, JP;
Toru Kambayashi, Chigasaki, JP;
Yasuhiko Suzuki, Koganei, JP;
Akio Okazaki, Yokohama, JP;
Kenichi Hiramatsu, Kawasaki, JP;
Sunao Wada, Yokohama, JP;
Koji Mikami, Kawasaki, JP;
Akira Toshima, Yokosuka, JP;
Masao Suga, Ome, JP;
Akihiro Kasahara, Sambu-gun, JP;
Shingo Miyazaki, Fuchu, JP;
Naoki Endo, Fuchu, JP;
Takehisa Kato, Kunitachi, JP;
Daigo Yoshii, Fuchu, JP;
Koichi Noguchi, Yokohama, JP;
Hideo Shimizu, Kawasaki, JP;
Toru Kambayashi, Chigasaki, JP;
Yasuhiko Suzuki, Koganei, JP;
Akio Okazaki, Yokohama, JP;
Kenichi Hiramatsu, Kawasaki, JP;
Sunao Wada, Yokohama, JP;
Koji Mikami, Kawasaki, JP;
Akira Toshima, Yokosuka, JP;
Masao Suga, Ome, JP;
Akihiro Kasahara, Sambu-gun, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
Each embodiment of this invention implements step-by-step and empirical authentication of devices upon digital authentication among a plurality of devices. Each of a plurality of authentication devices of each embodiment can unidirectionally generate a hash value of a low experience rank from a hash value of a high experience rank, and receives a set of high experience rank and hash value in accordance with an experience. Upon receiving a certification request of the experience rank from another authentication device, the authentication device transmits a corresponding hash value to the authentication device as a request source. Upon sending a certification request of an experience rank to another authentication device, the authentication device verifies a hash value obtained from the other authentication device on the basis of a self hash value. In this way, the authentication devices authenticate each other's experience ranks.