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.
MORE FIDO in the News
Informatik aktuell: FIDO Passkeys 2 – in the future without a password
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Smashing Security: 339: Bitcoin boo-boo, deepfakes for good, and time to say goodbye to usernames?
Podcast episode where FIDO Passkeys are mentioned and linked to.