> If you want to publish proof of an event, you should have some pixels on a screen along with some cryptographic signature from a device sensor that would necessitate atleast a big corporation like Nikon / Sony / etc. being "in on it" to fake.
That idea doesn't work, at all.
Even assuming a perfect technical implementation, all you'd have to do to defeat it is launder your fake image through a camera's image sensor. And there's even a term for doing that: telecine.
With the right jig, a HiDPI display, and typical photo editing (no one shows you raw, full-res images), I don't think such a signature forgery would detectable by a layman or maybe even an expert.
That idea doesn't work, at all.
Even assuming a perfect technical implementation, all you'd have to do to defeat it is launder your fake image through a camera's image sensor. And there's even a term for doing that: telecine.
With the right jig, a HiDPI display, and typical photo editing (no one shows you raw, full-res images), I don't think such a signature forgery would detectable by a layman or maybe even an expert.