With the introduction of their Titan Security Keys, Google is making it harder for you to get hacked. Available in both USB & Bluetooth forms, they take two-factor authentication (2FA), a step further. Most 2FA works by requiring an extra authentication, like an SMS code sent to your phone in addition to username and password for log-in. Google’s Titan keys replace that 2nd factor with the physical form of a key,—which must be connected for you to successfully log in. Both work without a network or battery power, the USB for your desktop or laptop & the Bluetooth which acts as a dongle for your mobile devices.