ctap2

OpenSK is an open-source implementation for security keys written in Rust that supports both FIDO U2F and FIDO2 standards.

FIDO2 Conformant WebAuthn and Passkey backend library for golang

Convert your Android phone to any USB device you like! USB Gadget Tool allows you to create and activate USB device roles, like a mouse or a keyboard. 🛠🛡📱

Passkey credential provider for hardware security keys

Arduino based firmware for FIDO2 Authenticator

Passkey and security-key app for Flipper Zero with WebAuthn, FIDO2, U2F, USB HID, and NFC support.

W3C Web Authentication API Relying Party for Node.js and Express

This is a mirror. Work is continued on Codeberg: https://codeberg.org/r4gus/PassKeeZ

Vendor Neutral, Rust-Based Management UI and CLI for U2F/FIDO2 and other hardware security keys

work is continued on codberg: https://codeberg.org/r4gus/keylib

Test tool for CTAP2 authenticators

YAFU - Yet Another FIDO Utility. FIDO2 toolbox in Java for USB/NFC devices.

LionKey: An open-source FIDO2 USB Security Key 🔑 implemented on STM32H533. CTAP 2.1 compliant. Supports passkeys.

FIDO2 PC/SC CTAPHID Bridge

FIDO2 roaming authenticator library for Android OS

Minimal FIDO2 library for microcontrollers

Layered Go implementation of CTAP 2.0–2.3 with commands, transports, and stateful authenticator workflows

c# FIDO2.CTAP library

Open-source Windows 11 FIDO2/WebAuthn authenticator with TPM-backed keys, local passkeys, and TOTP.

Experimental RP2040 FIDO2/WebAuthn authenticator with packed attestation and documented Windows/Entra interoperability