zlacker

Can we cryptographically sign a photo in a way that shows it was generated in a particular place? I'm thinking of some sort of beacon in a location that allows you to say this person was here, at least. I'm not sure if it's possible to go beyond presence and indicate anything else about the situation?

I hesitate to say it, but a blockchain is probably part of the solution.

>>pbhjpb+(OP)
There is this trend going on where hardware vendors are increasingly locking down their hardware, and this could be a part of the solution you are looking for. Not everyone will be happy about it, however.

>>pbhjpb+(OP)
you can but any sort of even trivial editing would undo it.