Hi! You don't need an x.com account to download, that's just the easiest way to dm me. If you're actually interested, I can let you try it! The source is also available.

It proves 1) that an apple device with a secure enclave signed it. 2) that my app signed it.

If you trust the binary I've distributed is the same as the one on the app store, then it also proves: 3) that it was typed on my keyboard not using automation (though as others have mentioned, you could build a capacitive robot to type on it) 4) that the typer has the same private key as previous messages they've signed (if you have an out of band way to corroborate that's great too) 5) optionally, that the person whose biometrics are associated with the device approved it.

There is also an optional voice to text mode that uses 3d face mesh to attempt to verify the words were spoken live.

Not every level of verification is required by the ptrotocol, so you could attest that it was written on a keyboard, but not who wrote it (not yet implemented in the client app).

The protocol doesn't require you to run my app, if you compile it yourself, you can create your own web of trust around you!

>that an apple device with a secure enclave signed it.

What Apple devices are supported? All I have is a iPhone 4 running a old iOS version(pre iOS 7) (which I will not update and I don't think has a secure enclave) and a M1 mac mini and some lightning earpods and a apple thunderbolt display and some USB-A chargers and some old MacBooks.

I saw something about android (https://typed.by/manifesto#:~:text=Android,Integrity) on the website, but it mentioned Play Integrity which I do not have becuase I use LineageOS for MicroG.

I think that the concept is stupid becuase it would require to somehow prove that the app is not modified(which is impractical) and there is no stylus on a motor or fake screen(which is also impractical).

I think that a better aproach would be to form a Web Of Trust where only people's (not just humans, this would include all animals and potentially aliens but no clankers) certificates are signed, but with a interface that is friendly to people who are not very into technology but with some sort of way to not have who your friends are revealed, but this would still allow someone to get a attestation for their robot.