Impeding forgers at photo inception
Matthias Kirchner, Peter M. Winkler, Hany Farid · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2013
We describe a new concept for making photo tampering more difficult and time consuming, and for a given amount of time and effort, more amenable to detection. We record the camera preview and camera motion in the moments just prior to image capture. This information is packaged along with the full resolution image. To avoid detection, any subsequent manipulation of the image would have to be propagated to be consistent with this data - a decidedly difficult undertaking.