Two-step sign-in
A password can be guessed or reused. With this on, signing in also needs a code that only you have.
Scan this with your authenticator app
Google Authenticator, Authy, 1Password — any of them.
Can't scan it? Type this key in by hand:
We check this code against the key above. Nothing is switched on until it matches, so you cannot lock yourself out here.
Save these recovery codes
Each works once, if you ever lose your phone. This is the only time they are shown.