On Tue, Nov 7, 2023, 3:04 PM John Clark <johnkcl...@gmail.com> wrote:
> > > On Tue, Nov 7, 2023 at 1:59 PM Jason Resch <jasonre...@gmail.com> wrote: > > > *> How does Apple (or whoever is signing the image and its metadata) know >> it was taken by an iphone at a particular location?* >> > > Regardless of how the picture was produced, the GPS timestamp created by > the GPS people can verify exactly when it was made, and can verify where > the picture was claimed to have been made. > GPS works entirely passively on the receiver side. There would be no external validation of the GPS coordinates. And Apple Corporation can verify that the iPhone that was supposed to have > taken the picture has been registered to Mr. Joe Blow. So if the picture is > an embarrassing picture of a politician and if the picture is phony then > Mr. Blow must be involved. Mr. Blow is either an innocent bystander who > got his iPhone hacked and his secret key stolen, or he is actively engaged > in deception because he wants the politician to lose the next election. > But if there's no evidence of any hacking and if Mr. Blow has no history of > criminality and seems pretty apolitical and if it's not impossible that the > politician could have been at that place at that time, then it would be > reasonable to conclude that the photograph was real. > Yes, and note, that again it reduces entirely to whatever trust you have or don't in Mr. Blow. Apple adds no additional trust to the veracity of the images, it only serves in establishing the identity of Mr. Blow. But there are better and existing schemes for this which don't require sending all your images to Apple (certificate authorities). > > That's certainly an improvement to what we have now; a photograph with > no provenance at all, an anonymous person just posts a picture on the > Internet with no hint about where or when the picture was taken or by who. > I agree. But it's important to recognize what problems cryptography does it doesn't solve. It can solve the problem of provenance (who generated the image) but it can't solve the more general problem of is this a deep fake or not. Jason > > John K Clark See what's on my new list at Extropolis > <https://groups.google.com/g/extropolis> > qoz > > q0z > > -- > You received this message because you are subscribed to the Google Groups > "Everything List" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to everything-list+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/everything-list/CAJPayv1r1TOfKn7k7CqCHba5Kg7BMY6SQKr6KXSKmoktSTSRog%40mail.gmail.com > <https://groups.google.com/d/msgid/everything-list/CAJPayv1r1TOfKn7k7CqCHba5Kg7BMY6SQKr6KXSKmoktSTSRog%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to everything-list+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/everything-list/CA%2BBCJUi9bduPJBiTHJEb4kA996X7CLaHra%2BLJRD89QVFadPH5A%40mail.gmail.com.
