A FIDO Security Key uses a specialized USB device to help secure your account with multi-factor authentication (MFA).
To set up FIDO Security Key for MFA:
2. You will be prompted to insert your security key into a USB port on your computer. Follow the prompts to complete the set-up process.
After set-up is complete, in order to use the FIDO Security Key as an MFA option, just insert the key into a USB port during the sign-in process, and follow the onscreen instructions.
NOTE: Security Keys are currently supported by Google Chrome since version 38 and Opera since version 40.