Windows logon using Google Authenticator

Question

Do you know if there is a free (or even better, open source) implementation of the Windows login screen to use with Google Authenticator or any time based authenticator.

It would be a great/cheap way to add 2 factor authentication to Windows.

Answer 1

So far, I've found pGina which is an open source, pluggable, open source credential provider for windows. But there is no Google Authenticator plugin for it.

There is also mOTP-cp and OpenOTP-cp. I didn't test them, but they seem to do exactly what I asked for.