Researchers crack Nikon image authentication system

ElcomSoft researched Nikon’s Image Authentication System, a secure suite validating if an image has been altered since capture, and discovered a major vulnerability in the manner the secure image signing key is handled.

This allowed the company to extract the original signing key from a Nikon camera. The vulnerability, when exploited, makes it possible to produce manipulated images with a fully valid authentication signature. ElcomSoft was able to successfully extract the original image signing key and produce a set of forged images that successfully pass validation with Nikon Image Authentication Software.
Source: http://www.net-security.org/secworld.php?id=10960