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

• UpdatedNov 26, 2025
• Rust

U2F USB token optimized for physical security, affordability, and style

• UpdatedSep 1, 2022
• C

Solo 1 firmware in C

• UpdatedNov 13, 2022
• C

Python library and command line tool for configuring any YubiKey over all USB interfaces.

• UpdatedDec 12, 2025
• Python

WebAuthn (FIDO2) server library written in Go

• UpdatedDec 5, 2022
• Go

🔏 A small WebAuthn API wrapper that translates to/from pure JSON using base64url.

• UpdatedAug 25, 2025
• TypeScript

Zero trust system

• UpdatedDec 16, 2025
• Go

Pluggable Authentication Module (PAM) for U2F and FIDO2

• UpdatedMar 27, 2025
• C

A portable Java library for WebAuthn(Passkeys) server side verification

• UpdatedDec 15, 2025
• Java

Server-side Web Authentication library for Javahttps://www.w3.org/TR/webauthn/#rp-operations

• UpdatedDec 15, 2025
• Scala

FIDO-U2F / FIDO2 / Webauthn Framework

• UpdatedDec 16, 2025
• PHP

A tool to detect when your YubiKey is waiting for a touch (to send notification or display a visual indicator on the screen)

• UpdatedOct 6, 2025
• Go

FIDO2 (WebAuthn) and FIDO U2F platform library for Linux written in Rust

• UpdatedOct 29, 2025
• Rust

Core implementations of an open-source secure key

• UpdatedMay 5, 2025
• C

u2f token firmware for stm32f103 and efm32hg boards

• UpdatedJul 23, 2023
• C

A tiny ARM microprocessor which fits in your USB port.

• UpdatedNov 10, 2021
• PostScript

DEPRECATED Krypton turns your iOS device into a WebAuthn/U2F Authenticator: strong, unphishable 2FA.

• UpdatedNov 7, 2023
• Swift

Provides Okta authentication for awscli

• UpdatedAug 27, 2024
• Python

U2F security token emulator written in Rust

• UpdatedJan 22, 2024
• Rust

Rust library to interact with Security Keys, used by Firefox

• UpdatedNov 7, 2025
• Rust