AI summary
Authnkey is an open-source credential provider that brings full CTAP2 support for FIDO2 security keys via NFC and USB. It enables PIN-protected passkeys and discoverable credentials, filling a gap in Android's built-in WebAuthn implementation.
Generated by AI. May contain inaccuracies.
About this app
Authnkey is a credential provider that lets you use FIDO2 security keys (like YubiKey or SoloKey) for passkey authentication on Android.
Android's built-in WebAuthn support has a significant gap: it does not support CTAP2 over NFC. This means you cannot use PIN-protected passkeys or discoverable credentials with NFC security keys — you're limited to basic U2F tap-to-authenticate. Authnkey fills this gap by implementing the full CTAP2 protocol.
The app registers as a credential provider, so any app or browser that supports the Android Credential Manager API will offer Authnkey as an option when passkeys are requested.
This also works on devices without Google Play Services, since Authnkey implements the CTAP2 protocol directly rather than relying on Google's FIDO2 API.
Supported features: - Passkey creation and authentication - PIN verification - Discoverable credentials - Multiple accounts per site - NFC and USB transports
No root required.
What's new
Fix correct PINs being rejected with some security keys - Fix passkey creation failing when a PIN prompt was required - Add support for setting the app's language in system settings
About this version
- Version
- 1.2.4 (11)
- Size
- 2.45 MB
- Requires Android
- 14
- Target SDK
- 34
- Architecture
- universal
- Downloads
- 20
- Updated
- Jul 5, 2026
- Package
- pl.lebihan.authnkey
Ratings & reviews
- 50
- 40
- 30
- 20
- 10