Cool story, but the eff is the best suited publication to deal with the intrinsic legal issues, and im disappointed they let that field lay fallow.

Namely, a passkey is something you have- does that mean it can be seized with a warrant the same way your biometrics can be, or the same way papers in a locked safe can be?

I think the answer is yes, Lavabit was famously compelled to produce cryptographic key material.