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.

Solution

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.

Comments

[CAD bloke]

not free so not an answer but for ~$30: rohos.com/2013/02/google-authenticator-windows-login

[Brain2000]

Update: mOTP is now here github.com/multiOTP/multiotp