> Is there any way to use this system without an extra device (no phone, no key, only my pc)?
I've used rust-u2f in the past, although it seems to be Linux only. https://github.com/danstiner/rust-u2f
I've used rust-u2f in the past, although it seems to be Linux only. https://github.com/danstiner/rust-u2f
Looks like it answers some of my concerns. Super cool!