U2F/FIDO is superior to other 2sv (2-step verification) authentication
systems because it's a "what you know and *what you have*" system that makes
such a difference. The phisher doesn't have your key. When Google
implemented this internally, successful phishing dropped to zero.

Using U2F/FIDO security keys to protect your Google account:
https://support.google.com/accounts/answer/6103523
https://help.twitter.com/en/managing-your-account/two-factor-authentication

By admin