Google launched support Tuesday for Security Key, an open standard that lets users log in to their account with a physical device. The device replaces things like the six-digit confirmation code used by Google's two-factor authentication practices. The system still requires a password. When signing into Google Accounts using Chrome and Security Key the cryptographic signature cannot be phished, per Google. While the Security Key works with Google Accounts at no charge, users will need to purchase a compatible USB device directly from a U2F participating vendor.