YubiKey Support

U2F-enabled Security Key, such as the YubiKey, user login is bound to the origin, meaning that only the real site can authenticate with the key. The authentication will fail on the fake site even if the user was fooled into thinking it was real. This greatly mitigates against the increasing volume and sophistication of phishing attacks and stops account takeovers.

Standard https://www.yubico.com/authentication-standards/fido-u2f-standard/