Amazon.com: Yubico FIDO Security Key NFC - Two Factor Authentication USB and NFC Security Key, Fits USB-A Ports and Works with Supported NFC Mobile Devices – FIDO U2F and FIDO2 Certified -
What is FIDO U2F? | Security Encyclopedia
Key-ID FIDO U2F security key - Smartcard Focus
Amazon.com: FIDO U2F Security Key, Thetis [Aluminum Folding Design] Universal Two Factor Authentication USB (Type A) for Extra Protection in Windows/Linux/Mac OS, Gmail, Facebook, Dropbox, SalesForce, GitHub : Electronics