I think at this point you are solving a wrong problem. Getting root access through X zero days exploits is not so hard. And if you uninstall `sudo` and `su`, and only login as root on dedicated TTY, you have very similar security.
I use Qubes OS for stuff like this. Way better security, no need to juggle tokens, dedicated lans and so on. Only real problem is no graphical acceleration in browser (Google Earth...)
I use Qubes OS for stuff like this. Way better security, no need to juggle tokens, dedicated lans and so on. Only real problem is no graphical acceleration in browser (Google Earth...)