4 ms·
You might not have understood how this works. The prover shows the fact that they know Waldo's position by showing the page covered in foil to the verifier in p
by amenghra 4y ago
You might not have understood how this works. The prover shows the fact that they know Waldo's position by showing the page covered in foil to the verifier in person (or by taking a picture). The verifier does not manipulate anything.
Obviously, there's no way to verify that the page under the foil is the page you think it is. This is more of an analogy / tool to explain things vs an actual secure protocol.
- moffkalast 4y agoThinking again, I may have read too much into the foil thing. A better example would be a just a cut-out of Waldo, separate from everything else. I'm sure it's a massive simplification of the way it's actually used.
- amenghra 4y agoTrue. Or a photocopy of the page + cut-out to make it non-destructive. Or just a picture of the page cropped around Waldo.
- Double_a_92 4y agoBut then what is the point of the foil? Just take a very zoomed in photo of Waldo?
- amenghra 4y agoRight, that would be equivalent. Or a regular photo which is then cropped.
- yencabulator 4y agoIt's a real-world application of cropping the visible area, for a kid to show to another kid, ELI5 style.