I still don't understand the state of hardware tokens. Everyone hates Yubikey, but the closest alternative available is Nitrokey which doesn't even come close to the form factor, or support U2F in their most expensive key option.<p>Now I learn there's something called GnuK but Google leads me to an obscure doc on building it yourself.<p>Until there are better options out there, I guess I'll stick to my Yubikey NEO