It would be interesting if digital cameras would cryptographically sign photos. I'm sure there would be ways around that too (see also DRM arms race). Or at th

It would be interesting if digital cameras would cryptographically sign photos. I'm sure there would be ways around that too (see also DRM arms race). Or at the very least use the photographer's private key to sign the photo. That might not prevent photo manipulation if the photographer wants to manipulate their photo but would prevent others from manipulating it.