I can break it with zero skills. Tripod, camera, clear monitor in a dark room ... just take a real photo of a fake photo.
That might be detectable if they signed content contains focal-length metadata... but even then, some foresight and a collection of lenses would hide it.
see also https://en.wikipedia.org/wiki/Telecine
That might be detectable if they signed content contains focal-length metadata... but even then, some foresight and a collection of lenses would hide it.