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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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Maybe the White House should create a hash of the video and add it to a public blockchain. Anyone can then verify if the video is authentic.
Blockchain is the opposite of what you want for this problem, I'm not sure why people bring this up now. People need to take an introductory cryptography course before saying to use blockchain everywhere.
Putting it on the blockchain ensures you can always go back and say "see, at this date/time, this key verified this file/hash".. If you know the key of the uploader (the white house), you can verify it was signed by that key. Guatemala used a similar scheme to verify votes in elections using Bitcoin. Could the precinct lie and put in the wrong vote count? Of course! But what it prevented was somebody saying "well actually the precinct reported a different number" since anybody could verify that on chain they didn't. It also prevented the precinct themselves from changing the number in the future if they were put under some kind of pressure.
Trusted timestamping protocols and transparency logs exists and does that more efficiently