The White House wants to ‘cryptographically verify’ videos of Joe Biden so viewers don’t mistake them for AI deepfakes::Biden’s AI advisor Ben Buchanan said a method of clearly verifying White House releases is “in the works.”

  • Natanael
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    110 months ago

    No, it took a week to refine the attack algorithm, the collision generation itself is fast

    The point of perceptual hashes is to let you check if two things are similar enough after transformations like scaling and reencoding, so you can’t rely on that here

    • Pup Biru
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      110 months ago

      oh yup that’s a very fair point then! you certainly wouldn’t use it for security in that case, however there are a lot of ways to implement this that don’t rely on the security of the hash function, but just uses it (for example) to point to somewhere in a trusted source to manually validate that they’re the same

      we already have the trust frameworks; that’s unnecessary… we just need to automatically validate (or at least provide automatic verifyability) that a video posted on some 3rd party - probably friendly or at least cooperative - platform represents reality

      • Natanael
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        110 months ago

        I think the best bet is really video formats with multiple embedded streams carrying complementary frame data (already exists) so you decide video quality based on how many streams you want to merge in playback.

        If you then hashed the streams independently and signed the list of hashes, then you have a video file which can be “compressed” without breaking the signature by stripping out some streams.