Patents Assigned to Naigai Process Co., Ltd.
  • Digital data false alteration detection program and digital data false alteration detection apparatus
    Patent number: 7840007
    Abstract: A digital data false alteration detection program causes a computer to execute (a) a step (S1) of dividing digital data into a plurality of smaller block data, (b) a step (S2) of extracting noise inherent to a digital data acquisition device for each of the small block data, (c) a step (S3) of calculating correlation of the noise between adjacent small block data, and (d) a step (S4) of detecting small block data having noise correlation lower than a level predetermined for the surrounding small block data, as falsely altered data.
    Type: Grant
    Filed: December 3, 2002
    Date of Patent: November 23, 2010
    Assignees: Fuso Precision Co., Ltd., Naigai Process Co., Ltd.
    Inventors: Naoto Takeda, Masamichi Taniguchi, Kunio Taniguchi, Kiyotaka Yamamoto