Google Authenticator is a particularly popular smartphone application that can be used as a token for many two factor authentication (2FA) systems by generating a time-based one time password ...

You'll get a QR code or setup key. Next, open the Google Authenticator app and tap the plus sign. Record the 2FA code/key. Whenever you're asked for the 2FA code, open Google Authenticator to find it.

Where do you get that code? There are several options, but the one I’ll use is from the Google Authenticator application. You can get the application for Apple devices, Blackberries, and–of ...