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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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You must be severely misunderstanding the idea. The idea is not to encrypt it in a way that it's only unlockable by a secret and hidden key, like DRM or cable TV does, but to do the the reverse - to encrypt it with a key that is unlockable by publicly available and widely shared key, where successful decryption acts as a proof of content authenticity. If you don't care about authenticity, nothing is stopping you from spreading the decrypted version, so It shouldn't affect consumers one bit. And I wouldn't describe "Get a bunch of cameras, rip the sensors out, carefully and repeatedly strip the top layers off and scan using electron microscope until you get to the encryption circuit, repeat enough times to collect enough scans undamaged by the stripping process to then manually piece them together and trace out the entire circuit, then spend a few weeks debugging it in a simulator to work out the encryption key" as "trivial"
I think you are misunderstanding things or don't know shit about cryptography. Why the fuck are y even talking about publicly unlockable encryption, this is a use case for verification like a MAC signature, not any kind of encryption.
And no, your process is wild. The actual answer is just replace the sensor input to the same encryption circuits. That is trivial if you own and have control over your own device. For your scheme to work, personal ownership rights would have to be severely hampered.
A MAC is symmetric and can thus only be verified by you or somebody who you trust to not misuse or leak the key. Regular digital signatures is what's needed here
You can still use such a signing circuit but treat it as an attestation by the camera's owner, not as independent proof of authenticity.
You sign them against a known public key, so anybody can verify them.
If it's just the cameras owner attesting, then just have them sign it. No need for expensive complicated circuits and regulations forcing these into existence.
You can't use a MAC for public key signatures. That's ECC, RSA, and similar.