Patents by Inventor Norihiro TSUJIMOTO

Norihiro TSUJIMOTO 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).

  • On-vehicle device, ground data-managing device, ground-to-vehicle communication security system, and ground-to-vehicle communication method
    Patent number: 11044603
    Abstract: An on-vehicle device mounted on a train includes a second on-vehicle-side wireless communication unit that performs wireless communication with the ground side, and an on-vehicle-side ground-to-vehicle communication security unit that encrypts or decrypts wireless communication data. The on-vehicle-side ground-to-vehicle communication security unit includes an on-vehicle-side secret-key holding unit that retains a plurality of secret keys that have secret key numbers for performing encryption or decryption; an on-vehicle-side secret-key selecting unit that selects one secret key from the on-vehicle-side secret-key holding unit using a secret key number calculated using train information unique to a train; and an on-vehicle-side encryption and decryption processing unit that performs encryption or decryption using the one secret key selected by the on-vehicle-side secret-key selecting unit.
    Type: Grant
    Filed: April 28, 2016
    Date of Patent: June 22, 2021
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Satoshi Kaede, Norihiro Tsujimoto, Tetsushi Matsuda
  • ON-VEHICLE DEVICE, GROUND DATA-MANAGING DEVICE, GROUND-TO-VEHICLE COMMUNICATION SECURITY SYSTEM, AND GROUND-TO-VEHICLE COMMUNICATION METHOD
    Publication number: 20190135312
    Abstract: An on-vehicle device mounted on a train includes a second on-vehicle-side wireless communication unit that performs wireless communication with the ground side, and an on-vehicle-side ground-to-vehicle communication security unit that encrypts or decrypts wireless communication data. The on-vehicle-side ground-to-vehicle communication security unit includes an on-vehicle-side secret-key holding unit that retains a plurality of secret keys that have secret key numbers for performing encryption or decryption; an on-vehicle-side secret-key selecting unit that selects one secret key from the on-vehicle-side secret-key holding unit using a secret key number calculated using train information unique to a train; and an on-vehicle-side encryption and decryption processing unit that performs encryption or decryption using the one secret key selected by the on-vehicle-side secret-key selecting unit.
    Type: Application
    Filed: April 28, 2016
    Publication date: May 9, 2019
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Satoshi KAEDE, Norihiro TSUJIMOTO, Tetsushi MATSUDA