[delish]

Those are all situationally-valid criticisms, but I've long thought the ability to have smartphones' cameras cryptographically sign photos is good when available. The use case is demonstrating a photo wasn't doctored, and that it came from a device associated with e.g. a journalist, who maintains a public key. Of course, it should be optional.

[magicseth]

Yes! That's what I'm getting at. This protocol optionally allows you to sign with your private key, but you don't have to for the protocol to provide utility. It could just be enough to say "if you trust magicseth's binary and apple, then this was typed one letter at a time"

There's nothing stopping folks from typing a message an LLM wrote one at a time, but the idea of increasing the human cost of sending messages is an interesting one, or at least I thought :-(

[radlad]

The problem is that it's not optional to end-users if sites enforce its use.

[hedora]

The other problem is that the device or company might decide not to attest for you.

For instance, the employee at Apple that decided to pull ICE Block from the store could decide that the "admissible in court" bit should be false if it looks like a police officer is in frame.

Similarly, the keyboard could decide your social credit score is too low, and just stop attesting. A court could order this behavior.

Or, you could fail mandatory age / id verification because your credit card expired, and then all the above + more could happen! Good luck getting through to credit card tech support at that point...