×

System and method for authentication of JPEG image data

  • US 7,493,489 B2
  • Filed: 07/22/2002
  • Issued: 02/17/2009
  • Est. Priority Date: 07/22/2002
  • Status: Expired due to Fees
First Claim
Patent Images

1. A method for providing self-authentication for an image file of JPEG image data, the image file of JPEG image data having a first section and a second section, the first section containing a predetermined number of blocks of transformed coefficients and the second section containing a predetermined number of blocks of transformed coefficients and a least significant transmitted bit-plane block, comprising:

  • (a) producing a hashing function from the JPEG image data located in the first section of the image file of JPEG image data;

    (b) producing a first integrity checking number from the hashing function;

    (c) encrypting the first integrity checking number into a signature string;

    (d) embedding the signature string into a the least significant transmitted bit-plane block of the second section of the image file of JPEG image data; and

    (e) combining the sections of the image file of JPEG image data to create a self-authenticating image file of JPEG image data.

View all claims
  • 3 Assignments
Timeline View
Assignment View
    ×
    ×