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. 24, 2008
Filed:
Jun. 09, 2003
Tadashi Kaji, Fujisawa, JP;
Takahiro Fujishiro, Yokohama, JP;
Yoko Kumagai, Tokyo, JP;
Shingo Hane, Yokohama, JP;
Hiromi Nagano, Tokyo, JP;
Tadashi Kaji, Fujisawa, JP;
Takahiro Fujishiro, Yokohama, JP;
Yoko Kumagai, Tokyo, JP;
Shingo Hane, Yokohama, JP;
Hiromi Nagano, Tokyo, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
If a CRL is cached for an increased speed of a certificate validation process, when a certification authority issues a CRL in an urgent situation, the accuracy of the certificate validation result cannot be secured because the cached CRL is not the latest one. This problem is solved as follows. When it issues a CRL, the certification authority sends a CRL issuance notification to certificate validation servers. The certificate validation servers that received the CRL issuance notification cache the latest CRL. Thus, the accuracy of the certificate validation result can be secured.