> what if you sign the EXIF data. That only really guarantees that version of the image. If you adjust the saturation or curves or exposure... or correct for so

> what if you sign the EXIF data. That only really guarantees that version of the image. If you adjust the saturation or curves or exposure... or correct for some lens aberration does that EXIF information still match the resulting photo? For that matter, what if you crop it to a square from a rectangle or stitch two images into a panorama? While you won't be able to verify the final work mechanically by just verifying the signature, at least, if you bundle the original raw file with the final work, an human (or an AI!) should be able to tell if the final work is at least derived from a real picture. But of course the analog hole is real.