Patents by Inventor Koha KINJO

Koha KINJO 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).

  • Publication number: 20220247569
    Abstract: A signature verification system includes a signature generation server, a signature verification server, and a verification key management server that are connected to one another via a communication network. The signature generation server includes: reporting means for, when a signing key and a verification key are generated by a publisher, reporting the verification key and publisher identification information that identifies the publisher to the verification key management server; and signature generation means for signing a bid request issued by the publisher with use of the signing key.
    Type: Application
    Filed: May 21, 2019
    Publication date: August 4, 2022
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Yuki OKANO, Tetsuya OKUDA, Koha KINJO
  • Patent number: 11316676
    Abstract: In Round1, each terminal device transmits a key encryption key which conforms to post-quantum cryptography to a neighboring terminal device; in Round2, each terminal device generates a key capsule of a key-shared-between-two-parties using the received key encryption key and returns the key capsule to a terminal device which is a source of the key encryption key; in Round3, each terminal device generates information based on the key-shared-between-two-parties and transmits the information to a key distribution management device and the key distribution management device distributes information, which is obtained based on these pieces of information, to the terminal devices. Each terminal device calculates a shared key based on the distributed information.
    Type: Grant
    Filed: November 12, 2018
    Date of Patent: April 26, 2022
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Koha Kinjo, Yuki Okano, Tsunekazu Saito
  • Publication number: 20220012730
    Abstract: A service providing system providing services to a plurality of users includes a transmitting unit configured to transmit, to a user terminal of each user, an authentication request requesting authentication for executing a predetermined process, a receiving unit configured to receive, from the user terminal of each user, an authentication response affixed with a user signature, and an executing unit configured to execute the predetermined process with respect to each user upon successful signature verification for all the plurality of users.
    Type: Application
    Filed: December 25, 2019
    Publication date: January 13, 2022
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Koha KINJO, Ryohei SUZUKI, Tetsuya OKUDA
  • Publication number: 20210342895
    Abstract: A communication system includes a transmitting device configured to transmit information, and a receiving device configured to receive the information, the receiving device includes a determination unit configured to determine whether or not an electronic certificate of the transmitting device used for a communication with the transmitting device is an EV certificate, and a process that is performed is varied according to a determination result of the determination unit.
    Type: Application
    Filed: October 11, 2019
    Publication date: November 4, 2021
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Koha KINJO, Tetsuya OKUDA, Yuki OKANO
  • Publication number: 20210125446
    Abstract: In a voting system including a vote broadcasting server and a plurality of client terminals, the vote broadcasting server generates a plurality of pieces of vote information that is data in which secret information is shared and transmits the vote information to each client terminal, each client terminal generates voting information by encrypting vote information such that the vote information can be decrypted when predetermined conditions are satisfied and transmits the voting information to the vote broadcasting server, the vote broadcasting server transmits a voting information group composed of voting information received from respective client terminals to the respective client terminals, and each client terminal ascertains a vote result according to the number of pieces of vote information decrypted from the voting information group and executes processing based on the vote result.
    Type: Application
    Filed: May 28, 2019
    Publication date: April 29, 2021
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Koha KINJO, Tetsuya OKUDA, Ryo KIKUCHI
  • Publication number: 20200322141
    Abstract: In Round1, each terminal device transmits a key encryption key which conforms to post-quantum cryptography to a neighboring terminal device; in Round2, each terminal device generates a key capsule of a key-shared-between-two-parties using the received key encryption key and returns the key capsule to a terminal device which is a source of the key encryption key; in Round3, each terminal device generates information based on the key-shared-between-two-parties and transmits the information to a key distribution management device and the key distribution management to device distributes information, which is obtained based on these pieces of information, to the terminal devices. Each terminal device calculates a shared key based on the distributed information.
    Type: Application
    Filed: November 12, 2018
    Publication date: October 8, 2020
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Koha KINJO, Yuki OKANO, Tsunekazu SAITO