Phone Week: Yubico YubiKey Review: Simple, Solid Protection for your Online Accounts

Additionally, YubiKey — or the underlying FIDO2/WebAuthn & U2F standards — isn’t supported everywhere. Most of the important services that you probably use likely support it. As of writing, you can lock down your Gmail, Yahoo, Facebook, or Protonmail accounts, for example. You can also log into your Gmail account using a YubiKey as a second factor in the macOS or iOS Mail apps.