FIDO Device Unlock allows you to use the same technology you use to unlock your device -- like a face scan, fingerprint or PIN -- to log in to websites in a safe and private manner. This may be Windows Hello face, fingerprint or PIN; Mac TouchID; Android Fingerprint; or iOS FaceID or TouchID. All of these operating systems have FIDO built in for safe and private logins.
FIDO security keys are small, portable high-security devices that connect to a phone or computer via USB, Bluetooth or NFC. Simply touching this device during sign-in protects accounts from a targeted attack 100% of the time.