Your Google Account is important. "One login, all of Google" also means one login will not only get you into all of your services and data, it potentially could let someone else in, too. And that's why, as we've told you over and over again, you need to use two-step authentication. That way, even if your password is cracked or — god forbid — stolen, any would-be trespassers have to obtain this secondary piece of verification in order to do anything. For most of us, that second step is provided by Google Authenticator, but Google has given us another method: U2F Security Keys.