The Yubico security key series combines hardware-based authentication with public key cryptography and the U2F and FIDO2 protocols to eliminate account takeovers. Prevent account takeovers and safeguard against data breaches with FIDO-based security that defends against man-in-the-middle attacks. You no longer need to reach for your smartphone or re-enter passcodes. Simply plug in your YubiKey and tap. The rest is taken care of for you. The YubiKey works with Windows and Mac, Gmail, Dropbox, Facebook, Salesforce, Duo, and many other services.