Patents by Inventor Ben SMYTH

Ben SMYTH 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 device, output device, verification device and input device
    Patent number: 9509492
    Abstract: According to an authentication device is for authenticating the validity of a subject ciphertext generated by encrypting a plaintext using homomorphic encryption. The authentication device includes a commitment generator and a response generator. The commitment generator is configured to generate a commitment from a randomly selected verification value, and transmit the commitment to a verification device for verifying the validity of the subject ciphertext. The response generator is configured to generate a response value generated by computing from an acquired challenge value, the plaintext, and the verification value, and transmit the response value to the verification device. The response generator is configured to generate the response value by a third operation where a result of a first operation using the response value is equal to a result of processing the challenge value, the subject ciphertext, and the commitment by a second operation.
    Type: Grant
    Filed: March 7, 2014
    Date of Patent: November 29, 2016
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Ben Smyth, Yoshikazu Hanatani, Hirofumi Muratani
  • AUTHENTICATION DEVICE, OUTPUT DEVICE, VERIFICATION DEVICE AND INPUT DEVICE
    Publication number: 20140334622
    Abstract: According to an authentication device is for authenticating the validity of a subject ciphertext generated by encrypting a plaintext using homomorphic encryption. The authentication device includes a commitment generator and a response generator. The commitment generator is configured to generate a commitment from a randomly selected verification value, and transmit the commitment to a verification device for verifying the validity of the subject ciphertext. The response generator is configured to generate a response value generated by computing from an acquired challenge value, the plaintext, and the verification value, and transmit the response value to the verification device. The response generator is configured to generate the response value by a third operation where a result of a first operation using the response value is equal to a result of processing the challenge value, the subject ciphertext, and the commitment by a second operation.
    Type: Application
    Filed: March 7, 2014
    Publication date: November 13, 2014
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Ben SMYTH, Yoshikazu Hanatani, Hirofumi Muratani