Patents by Inventor Mitsuru Nishioka

Mitsuru Nishioka 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).

  • Integrated circuit card, integrated circuit card processing system, and integrated circuit card authentication method
    Patent number: 6240517
    Abstract: An IC card processing system includes a telephone set for generating random number data, an IC card for processing value data, a secret key, and random number data by an authenticator generation function to generate authentication code, a switching unit for processing value data, a secret key, and random number data by an authenticator generation function to generate authentication code, and a comparator for comparing the authentication code generated by the IC card with the authentication code generated by the switching unit to authenticate the IC card.
    Type: Grant
    Filed: January 30, 1998
    Date of Patent: May 29, 2001
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Mitsuru Nishioka