I will assume you simply mean cryptographically signed as evidence of having been taken by a camera? You do realize that would still not provide perfect proof

I will assume you simply mean cryptographically signed as evidence of having been taken by a camera? You do realize that would still not provide perfect proof that what was recorded by the camera was real, right? It does seem like an obsolete idea you may not have fully reconsidered in a while. But considering that same old idea that dates from prior to the current state, I would also not be surprised if you imagined clandestinely including all kind of other things in this cryptographic signature like location, time and day, etc.; all of which can also be spoofed and is a tyrannical system’s wet dream. You don’t think that would be immediately abused, as it was in other similar ways like through all the on device image scanning that was injected as counter-CSAM appeals to save the children…of course?