FYI
Today we are starting Two-Factor Authentication beta tests.
.... Google Authenticator ....
What about Yubikey?
We don't plan to add Yubikey support in near future.
The implementation is trivial, and many people have them... If you are really interested in making Coinotron secure, then please consider Yubikey.
I thought a yubikey only worked for the website who issued it. You cannot, to the best of my knowledge, have 1 yubikey for many deifferent websites.
And I am curious why a pool should have such strong auth measures. Do you use the pool like a bank and store 1000s of dollars worth of alt coins on it?
That is about the only reason I can think of why a user would want two or three types of auth just to login.