Login or unlock screen on a Mac using an NFC tag?

Does OSX have support for unlocking the screen (or logging in) using a NFC or RFID tag?

The ACS ACR122T USB NFC dongle seems to have working OSX drivers, but I guess more needs to be done to support authentication.

A workaround is to store the password in the tag, and use a RFID/NFC reader that acts as an input device. But that doesn't sound very safe.