Patents by Inventor Shinji Oura

Shinji Oura 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).

  • Time authentication system, terminal device, time authentication method for conversation voice data for use therein, and program thereof
    Patent number: 8229088
    Abstract: A time authentication system provided can detect an alteration of the case, in which either of the speakers of a conversation makes the alteration, and can verify, in the case of no alteration, that a conversation voice has occurred at a time within a range. When a speaker #1 terminal (2) and a speaker #2 terminal (3), i.e., all the speakers of the conversation request a time authentication station server (1) for the issue of a unique background sound which is difficult for those other than the time authentication station server (1) to estimate beforehand, the time authentication station server (1) issues the background sound and an electronic verification, which is electronically signed by adding a time stamp to the hash of the background sound, to the speaker #1 terminal (2) and the speaker #2 terminal (3).
    Type: Grant
    Filed: November 16, 2005
    Date of Patent: July 24, 2012
    Assignee: NEC Corporation
    Inventor: Shinji Oura
  • Time Authentication System, Terminal Device, Time Authentication Method for Conversation Voice Data for Use Therein, and Program Thereof
    Publication number: 20080097753
    Abstract: A time authentication system provided can detect an alteration of the case, in which either of the speakers of a conversation makes the alteration, and can verify, in the case of no alteration, that a conversation voice has occurred at a time within a range. When a speaker #1 terminal (2) and a speaker #2 terminal (3), i.e., all the speakers of the conversation request a time authentication station server (1) for the issue of a unique background sound which is difficult for those other than the time authentication station server (1) to estimate beforehand, the time authentication station server (1) issues the background sound and an electronic verification, which is electronically signed by adding a time stamp to the hash of the background sound, to the speaker #1 terminal (2) and the speaker #2 terminal (3).
    Type: Application
    Filed: November 16, 2005
    Publication date: April 24, 2008
    Applicant: NEC Corporation
    Inventor: Shinji Oura