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    U2F Validation Servers

    The U2F libraries are now deprecated and no longer maintained.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

    C

    libfido2

    Java

    java-webauthn-server

    Python

    python-fido2

    Learn more about Passkeys, WebAuthn, and CTAP.

    Complete standalone U2F validation servers.