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The White House wants to 'cryptographically verify' videos of Joe Biden so viewers don't mistake them for AI deepfakes
(www.businessinsider.com)
this post was submitted on 11 Feb 2024
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Honestly I'd say that's on the way for any video or photographic evidence.
You'd need a device private key to sign with, probably internet connectivity for a timestamp from a third party.
Could have lidar included as well so you can verify that it's not pointing at a video source of something fake.
Is there a cryptographically secure version of GPS too? Not sure if that's even possible, and it's the weekend so I'm done thinking.
Positioning using distance bounded challenge-response protocols with multiple beacons is possible, but none of the positioning satellite networks supports it. And you still can't prove the photo was taken at the location, only that somebody was there.