Image data authentication system

摘要

Image data verification system that reliably determines whether image data generated by an image generation device such as a digital camera is altered or not without a significant increase of the computational capacity of the image generation device. The image generation device provides a hash of the image data (optionally, a keyed hash, or an encrypted hash of the data) to a separate verification data converting device, which appends a digital signature (using a private key KS). There is also provided an image verification device which verifies the digital signature (using the public key KP corresponding to KS).