Comment by gonzalohm

2 days ago

But you don't own your passkey. That's the biggest red flag. It's yet another wall by apple to prevent you from leaving their ecosystem

I think the OS is needed to sign the challenge, but the private key can be taken wherever. And passkeys are multiplatform. Not Apple-only, by a long shot.

And I suspect that most geeks, hereabouts, could set up their own signing system.