Tamper detection for identification documents

Abstract

Methods for detecting digital or physical tampering of an imaged physical credential include the actions of: receiving a digital image representing a physical credential having one or more high value regions, the digital image including an array of pixels; processing the digital image with a tamper detector to generate an output corresponding to an intrinsic characteristic of the digital image, the tamper detector configured to perform a pixel-level analysis of the high value regions of the digital image with respect to a predetermined tampering signature; and determining, based on the output from the tamper detector, whether the digital image has been digitally tampered with.

What is claimed is: 
     
         1 . A computer-implemented method for detecting digital or physical tampering of an imaged physical credential, the method being executed using one or more processors and comprising:
 receiving a digital image representing a physical credential having one or more high value regions, the digital image comprising an array of pixels;   processing the digital image with a tamper detector to generate an output corresponding to an intrinsic characteristic of the digital image, the tamper detector configured to perform a pixel-level analysis of the high value regions of the digital image with respect to a predetermined tampering signature; and   determining, based on the output from the tamper detector, whether the digital image has been digitally tampered with.