FIDO2/U2F👍

2-step verification with a hardware key (FIDO2/U2F).
The most secure and convenient use to authenticate login.
See/Idea:
◾https://youtu.be/fzUVrz0ixn8

For example:
◾https://www.yubico.com/ ( https://www.yubico.com/works-with-yubikey/catalog/ )
◾https://solokeys.com/

Yubikey
◾https://www.yubico.com/
◾https://www.yubico.com/why-yubico/how-the-yubikey-works/

Technical documentation for developers:
◾https://www.yubico.com/why-yubico/for-developers/

Self-verified integration or Yubico-verified integration:
◾https://www.yubico.com/works-with-yubikey/

After implementation, it would be nice to add to the directory:
◾https://www.yubico.com/pl/works-with-yubikey/catalog/

🤔
By the way, it is also an advertisement, because the promoted U2F solution in the catalog.
Info/Idea:
◾https://learn.microsoft.com/en-us/azure/active-directory/authentication/howto-mfa-getstarted