How to use two-factor authentication at btc-e? btc-e has a very confusing process of enabling 2-factor.
How should I use it?



Should I generate a one time password with a Yubikey?
Should I backup the private key / base32 ?

What does this auth process do?

(P.S. btc-e - you need to hire some better UX people)
it was easy to set up for me using an android phone ... just install the google auth, scan the code they give you on btc 

new users should take a screen shot of the QR code and print it out and save in secure location.  You can't get back to that QR code, so save it from the beginning.

Here is a more general info on the topic:

http://cadince.com/3-ways-to-move-google-authenticator/