Patents by Inventor Ahmet E. Dirik

Ahmet E. Dirik 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).

  • Image encryption for print-and-scan channels using pixel position permutation
    Patent number: 8705736
    Abstract: An image encryption method that includes receiving image data based on an image, wherein the image data comprises a plurality of pixel values, and permuting a plurality of, and preferably all of, the pixel values using at least a secret key to create permuted image data. Also, an image decryption method that includes scanning a printed image to create scanned image data. The printed image is generated from permuted image data that is generated by permuting a plurality of first pixel values of first image data using at least a secret key, obtaining a plurality of second pixel values from the scanned image data, and reverse-permuting a plurality of the second pixel values using at least the secret key to create reverse-permuted scanned image data.
    Type: Grant
    Filed: December 31, 2008
    Date of Patent: April 22, 2014
    Assignee: Pitney Bowes Inc.
    Inventors: Bertrand Haas, Ahmet E. Dirik, Yassir Nawaz
  • Image encryption for print-and-scan channels using pixel position permutation
    Publication number: 20100169649
    Abstract: An image encryption method that includes receiving image data based on an image, wherein the image data comprises a plurality of pixel values, and permuting a plurality of, and preferably all of, the pixel values using at least a secret key to create permuted image data. Also, an image decryption method that includes scanning a printed image to create scanned image data. The printed image is generated from permuted image data that is generated by permuting a plurality of first pixel values of first image data using at least a secret key, obtaining a plurality of second pixel values from the scanned image data, and reverse-permuting a plurality of the second pixel values using at least the secret key to create reverse-permuted scanned image data.
    Type: Application
    Filed: December 31, 2008
    Publication date: July 1, 2010
    Applicant: Pitney Bowes Inc.
    Inventors: Bertrand Haas, Ahmet E. Dirik, Yassir Nawaz