Patents by Inventor Tomoharu Morio

Tomoharu Morio 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).

  • Certificate validity authentication method and apparatus
    Patent number: 7409551
    Abstract: A time period which is expended since a request for the authentication of the validity of a public key certificate till the authentication of the validity, is shortened. A certificate validity authentication center VC periodically searches for and verifies paths which extend from a bridge certification authority CAbridge to individual terminal admitting certification authorities CA, and it registers the paths whose verifications have held good, in a path database in association with the respective terminal admitting certification authorities CA.
    Type: Grant
    Filed: June 14, 2006
    Date of Patent: August 5, 2008
    Assignee: Hitachi, Ltd.
    Inventors: Takahiro Fujishiro, Satoru Tezuka, Yoko Kumagai, Tomoharu Morio, Yutaka Miyazaki
  • Certificate validity authentication method and apparatus
    Publication number: 20060242413
    Abstract: A time period which is expended since a request for the authentication of the validity of a public key certificate till the authentication of the validity, is shortened. A certificate validity authentication center VC periodically searches for and verifies paths which extend from a bridge certification authority CAbridge to individual terminal admitting certification authorities CA, and it registers the paths whose verifications have held good, in a path database in association with the respective terminal admitting certification authorities CA.
    Type: Application
    Filed: June 14, 2006
    Publication date: October 26, 2006
    Inventors: Takahiro Fujishiro, Satoru Tezuka, Yoko Kumagai, Tomoharu Morio, Yutaka Miyazaki
  • Certificate validity authentication method and apparatus
    Patent number: 7080251
    Abstract: A time period which is expended since a request for the authentication of the validity of a public key certificate till the authentication of the validity, is shortened. A certificate validity authentication center VC periodically searches for and verifies paths which extend from a bridge certification authority CAbridge to individual terminal admitting certification authorities CA, and it registers the paths whose verifications have held good, in a path database in association with the respective terminal admitting certification authorities CA.
    Type: Grant
    Filed: August 30, 2001
    Date of Patent: July 18, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Takahiro Fujishiro, Satoru Tezuka, Yoko Kumagai, Tomoharu Morio, Yutaka Miyazaki
  • Certificate validity authentication method and apparatus
    Publication number: 20020046340
    Abstract: A time period which is expended since a request for the authentication of the validity of a public key certificate till the authentication of the validity, is shortened. A certificate validity authentication center VC periodically searches for and verifies paths which extend from a bridge certification authority CAbridge to individual terminal admitting certification authorities CA, and it registers the paths whose verifications have held good, in a path database in association with the respective terminal admitting certification authorities CA.
    Type: Application
    Filed: August 30, 2001
    Publication date: April 18, 2002
    Inventors: Takahiro Fujishiro, Satoru Tezuka, Yoko Kumagai, Tomoharu Morio, Yutaka Miyazaki