Patents by Inventor Eisei HONBU

Eisei HONBU 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).

  • Signature generation and verification system and signature verification apparatus
    Patent number: 9565023
    Abstract: A signature generation and verification system including a signature generation apparatus and a signature verification apparatus is provided. Based on signer certification information possessed by a signer, the signature generation apparatus generates a digital signature and verification data corresponding to a given electronic document and outputs the set of the digital signature and the verification data as signature data. Upon receipt of the electronic document and the signature data, the signature verification apparatus verifies the digital signature using the verification data to verify the integrity of the electronic document. As needed, the signature verification apparatus performs user identification ex-post facto by authenticating that the signer certification information from which the verification data was generated belongs to a legitimate user without knowledge of the signer certification information.
    Type: Grant
    Filed: July 10, 2013
    Date of Patent: February 7, 2017
    Assignee: Hitachi, Ltd.
    Inventors: Kenta Takahashi, Masakatsu Nishigaki, Yuta Yoneyama, Eisei Honbu
  • Signature Generation and Verification System and Signature Verification Apparatus
    Publication number: 20140019766
    Abstract: A signature generation and verification system including a signature generation apparatus and a signature verification apparatus is provided. Based on signer certification information possessed by a signer, the signature generation apparatus generates a digital signature and verification data corresponding to a given electronic document and outputs the set of the digital signature and the verification data as signature data. Upon receipt of the electronic document and the signature data, the signature verification apparatus verifies the digital signature using the verification data to verify the integrity of the electronic document. As needed, the signature verification apparatus performs user identification ex-post facto by authenticating that the signer certification information from which the verification data was generated belongs to a legitimate user without knowledge of the signer certification information.
    Type: Application
    Filed: July 10, 2013
    Publication date: January 16, 2014
    Inventors: Kenta TAKAHASHI, Masakatsu NISHIGAKI, Yuta YONEYAMA, Eisei HONBU