Anti-Forensics of Camera Identification and the Triangle Test by Improved Fingerprint-Copy Attack

Understand

The fingerprint-copy attack aims to confuse camera identification based on sensor pattern noise.

• However, the triangle test shows that the forged images undergone fingerprint-copy attack would share a non-PRNU (Photo-response nonuniformity) component with every stolen image, and thus can detect fingerprint-copy attack.
• In this paper, we propose an improved fingerprint-copy attack scheme.
• Our main idea is to superimpose the estimated fingerprint into the target image dispersedly, via employing a block-wise method and using the stolen images randomly and partly.