mozilla/browserid — Issue #1214: Authentication using smartcard
Author: biesi
Created: 2012-02-28 20:32:09+00:00
State: open

So this is probably sort of an edge case, but I would really like to be able to log in to my browser ID account with the smartcard I have (issued by a-trust in my case).

This would be much more secure than a password. Firefox supports using this card, and there are also DOM APIs for it:
https://developer.mozilla.org/en/JavaScript_crypto