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:
Feb. 19, 2013
Filed:
Jun. 29, 2010
Akane Sato, Yokohama, JP;
Takahiro Fujishiro, Yokohama, JP;
Shingo Hane, Tokyo, JP;
Yoko Hashimoto, Yokohama, JP;
Masahiko Furuya, Machida, JP;
Masami Ogawa, Tokyo, JP;
Akane Sato, Yokohama, JP;
Takahiro Fujishiro, Yokohama, JP;
Shingo Hane, Tokyo, JP;
Yoko Hashimoto, Yokohama, JP;
Masahiko Furuya, Machida, JP;
Masami Ogawa, Tokyo, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A certificate validation method for causing a certificate validation server to receive a certificate validation request from a given terminal device, build a certification path of from a first certificate authority (CA) to a second CA, perform validation of the certification path, and send a validation result to the terminal which issued the certificate validation request is disclosed. The validation server detects either a key update of any given CA or a compromise of the given CA, acquires a certificate of relevant CA and first certificate status information and second certificate status information, stores the acquired information in a storage unit or, alternatively, updates the information stored in the storage based on the acquired information, and performs the building of a certification path and validation of the certification path by use of the information of the storage unit.