Background on Universal Second Factor (U2F)
FIDO U2F is an emerging open authentication standards initiative with strong support from more than 180 end-user and vendor companies in the FIDO Alliance, a consortium working to bring strong authentication to the masses.
U2F breaks the mold for high-security, public-key hardware devices by removing the complexity of drivers, client software and the traditional costly certificate authority (CA) model.
With FIDO U2F, one single device can be used with any number of online services with no user information or encryption keys shared between the service providers.
To see where else you can use your U2F-certified YubiKey, see our FIDO U2F page. For additional FAQs, see our Support FAQs.
For more information about FIDO U2F, see the full U2F Specifications on the FIDO Alliance website.