Authnkey - FIDO Bridge

TOKEN2

About this app

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

Ratings and reviews

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.

Good. Not perfect. It works well for authenticating with passkeys that are already saved. It does not allow you to save new passkeys because it does not provide a way to enter the device PIN when creating new credentials. Still, it fills a very important need that Google has left unaddressed.

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

What’s new

- Show progress and errors while loading passkeys in credential management
- Add a button to copy device info to the clipboard
- Show clearer errors when NFC or USB communication fails
- Report the transports advertised by the key when creating a passkey
- Detect when the security key is unplugged
- Fix sign-in on accounts with many passkeys