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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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The best way this could be handled is a green check mark near the video that you could click on it and it would give you all the meta data of the video (location, time, source, etc) with a digital signature (what would look like a random string of text) that you could click on and your browser would show you the chain of trust, where the signature came from, that it's valid, probably the manufacturer of the equipment it was recorded on, etc.
The issue is making that green check mark hard to fake for bad actors. Https works because it is verified by the browser itself, outside the display area of the page. Unless all sites begin relying on a media player packed into the browser itself, if the verification even appears to be part of the webpage, it could be faked.
The only thing that comes to mind is something that forces interactivity outside the browser display area; out of the reach of Javascript and CSS. Something that would work for both mobile and desktop would be a toolbar icon that is a target for drag-and-drop. Drag the movie or image to the "verify this" target, and you get a dialogue or notification outside the display area. As a bonus, it can double for verifying TLS on hyperlinks while we're at it.
Edit: a toolbar icon that's draggable to the image/movie/link should also work the same. Probably easier for mobile users too.
If you set the download manager icon in the browser as permanently visible, then dragging it there could trigger the verification to also run if the metadata is detected, and to then also show whichever metadata it could verify.
That's a tad obscure, but makes it much easier to code up a prototype. I like it.