U2F Server 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The U2F libraries are now deprecated and no longer maintained.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 the low level primitives of the U2F protocol and are a good starting point for anyone intending to implement their own U2F server. Learn how to use a U2F server library here.

Third party implementations can be discovered on GitHub for example.

Note
Looking for all our U2F projects (not just server libraries)? Have a look at the complete list.