U2F Host Libraries

The U2F libraries are now deprecated and no longer maintained. We highly recommend transitioning to the FIDO2 libraries for enhanced security and compatibility.

Learn more about Passkeys, WebAuthn, and CTAP.

These libraries deal with communication on the (end-user) host side of things, such as handing data from a U2F enabled server and passing it to a U2F device connected over USB. If a U2F enabled web browser is going to be used by the end user, then these libraries should not be needed.