Patents Assigned to Digital Verification Ltd.
  • Patent number: 6766045
    Abstract: A method for verifying authenticity of a certificate under test, wherein an authentic version of the certificate has a known watermark in a predetermined watermark region thereof. The method includes capturing an image of at least a portion of the watermark region of the certificate under test. A correlation is found between the image of the watermark region and the known watermark. Responsive to the correlation, a portion of the image of the watermark region is registered with the known watermark, and a range of intensity values in the registered portion of the image is measured. A vector is defined in a decision space, the vector having coordinates given by the range of the intensity values and by a value of the correlation between the image of the watermark region and the known watermark. The certificate under test is determined to be authentic if the vector falls within a predefined area of the decision space.
    Type: Grant
    Filed: March 11, 2002
    Date of Patent: July 20, 2004
    Assignee: Digital Verification Ltd.
    Inventors: Edward Slepyan, Alexander Kugel, Julia Eisenberg
  • Publication number: 20030169899
    Abstract: A method for verifying authenticity of a certificate under test, wherein an authentic version of the certificate has a known watermark in a predetermined watermark region thereof. The method includes capturing an image of at least a portion of the watermark region of the certificate under test. A correlation is found between the image of the watermark region and the known watermark. Responsive to the correlation, a portion of the image of the watermark region is registered with the known watermark, and a range of intensity values in the registered portion of the image is measured. A vector is defined in a decision space, the vector having coordinates given by the range of the intensity values and by a value of the correlation between the image of the watermark region and the known watermark. The certificate under test is determined to be authentic if the vector falls within a predefined area of the decision space.
    Type: Application
    Filed: March 11, 2002
    Publication date: September 11, 2003
    Applicant: DIGITAL VERIFICATION LTD.
    Inventors: Edward Slepyan, Alexander Kugel, Ioulia Eisenberg