Thanks for the suggestions so far!
@james... yep, but anything digital is relatively easy to manipulate without leaving a trace. I'm pretty sure the EXIF data embedded in a jpeg can be changed.

@Ethelred: A fine suggestion, but not an easily-repeatable one. Incurring the wrath of the masses would probably mean I'd shortly end up in the slammer, which would limit the usefulness of that method.

@TRL: Prove that it's of a specific date in the past. The polaroid method works for 'today' but for any date in the past it isn't reliable.

It's a curious conundrum, eh? Some inventors post themselves a vacuum-sealed copy of their design work via recorded delivery and leave it unopened, in case a court case comes up in the future. I guess I'm looking for something like that, which might prove conclusively that a photo had been taken at a particular point in time.

Actually, maybe that would work... you could take the photo and get a copy made (digitally, developed or whatever) and then post it to yourself in a sealed envelope via recorded delivery. What a pain in the arse that would be though, eh?

I don't even have an application for this... it's just something that I couldn't resolve in my own head!
( chart cat has an itch, Fri 1 Aug 2008, 22:32, Reply)