YubiKey

YubiKey is a hardware-based 2FA device manufactured by Yubico to protect access to computers, networks, and online services that supports one-time passwords (OTP), public-key cryptography, and authentication, and the Universal 2nd Factor (U2F) and FIDO2 protocols. They come in a handful of form factors, but the key feature is on all of them: Someone has to be there, in person. to touch the button and release the key, or authentication just doesn't work.