Patents by Inventor Hiromi Nagano

Hiromi Nagano has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Authentication and authorization infrastructure system with CRL issuance notification function
    Patent number: 7392380
    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.
    Type: Grant
    Filed: June 9, 2003
    Date of Patent: June 24, 2008
    Assignee: Hitachi, Ltd.
    Inventors: Tadashi Kaji, Takahiro Fujishiro, Yoko Kumagai, Shingo Hane, Hiromi Nagano
  • Authentication and authorization infrastructure system with CRL issuance notification function
    Publication number: 20040111609
    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.
    Type: Application
    Filed: June 9, 2003
    Publication date: June 10, 2004
    Inventors: Tadashi Kaji, Takahiro Fujishiro, Yoko Kumagai, Shingo Hane, Hiromi Nagano