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About Authnkey - FIDO Bridge

Authnkey is a credential provider that lets you use FIDO2 security keys (like YubiKey, SoloKey, Nitrokey, or Token2) for passkey authentication on Android.

Many security keys don't fully work on Android: no PIN entry, no passkeys, just basic tap-to-authenticate.

Authnkey fixes that.

Install it, enable it in your phone's settings, and your FIDO2 security key or smartcard gains full passkey support over NFC and USB, including PIN and fingerprint verification and stored passkeys.

You can also manage your key right from the app: view and delete stored passkeys, and set or change its PIN.

Requires Android 14+ and a FIDO2-compatible security key or smartcard.

GitHub Repo:
https://github.com/mimi89999/Authnkey

Authnkey - FIDO Bridge details

Authnkey - FIDO Bridge is a free Productivity app for Android with 1,000+ installs on Google Play and a 4.8/5 average rating from 21 ratings. It was released on December 29, 2025 and last updated on August 6, 2026. It's developed by TOKEN2.

Category: Productivity
Rating: 4.8 / 5 (21 ratings)
Installs: 1,000+
Price: Free
In-app purchases: No
Ads: No ads
Current version: 1.2.5
Requires Android: Varies with device
Content rating: PEGI 3
Released: December 29, 2025
Last updated: August 6, 2026
Developer: TOKEN2

What’s new in Authnkey - FIDO Bridge

- Sort passkeys by domain in credential management - Show a hint with a shortcut to system settings when NFC is turned off - Adapt key connection instructions to the methods the device can use - Update privileged apps list, adding Waterfox among others

Version 1.2.5 · Updated August 6, 2026

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my yubikey was crashing my Samsung s25. this app solved my struggles using yubikey USB c with samsung

Jenny Chen

This app that shall be in android. There are no ads and it even works with feitian keys. The registration and auth flow are the missing things in android. Hats off for the dev.