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Building attestation into hardware sounds like a good idea in theory, but doesn't actually work. All it tells you is "this is what the camera saw", it doesn't a

Building attestation into hardware sounds like a good idea in theory, but doesn't actually work. All it tells you is "this is what the camera saw", it doesn't actually tell you that what the camera saw was real. You can just point your camera at a high resolution screen playing a doctored video, and so sign whatever doctored content you like. Or take a video of a real faked scene with actors.

samatman 4y ago
Of course it works, it works trivially. We mustn't confuse attestation with reputation, nor even the combination of attestation and reputation with truth. Attestation is nothing more than someone staking their reputation on the veracity of what they're sharing with the world. If I'm being frank, I thought this was too obvious to need stressing. If the camera is pointed at David Copperfield, cryptography can't make the lens show you reality. Attestation solves a lot of problems, but like my first sentence said, video integrity isn't a problem which can be solved anymore, if it ever was.