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The Hanko Authenticator is Hanko’s implementation of the FIDO Universal Authentication Framework (FIDO UAF) protocol. It lets you add strong, passwordless multi-factor authentication and transaction confirmation to your application using either:
  • a white-label Hanko Authenticator mobile app that authenticates out-of-band, or
  • the Hanko FIDO UAF Client SDK, which embeds on-device FIDO UAF authentication directly into your own native Android or iOS app.
Both approaches are built on top of Hanko’s certified FIDO server and the same underlying Hanko API.

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Use cases

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Hanko Authenticator & FIDO UAF

FIDO UAF offers a passwordless experience, much like passkeys, but embedded in an app on your user’s mobile device. The Hanko Authenticator offers strong two-factor authentication with a customizable white-label design using out-of-band communication. “Out-of-band” (OOB) communication means that authentication happens over a communication channel separate from the primary one: a user initiates authentication on their desktop and uses their mobile phone to authenticate via a biometric gesture or PIN, in response to a QR code or push notification transmitted via the out-of-band channel.
Hanko Authenticator out-of-band use case
Using OOB communication does not require users to have a desktop device with built-in biometric capabilities or any type of hardware-based key store (e.g. a TPM chip) — it works with any desktop device that has a browser. Get started with the Hanko Authenticator app

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On-device authentication with the FIDO UAF Client

You can integrate FIDO-based strong multi-factor authentication directly into your existing mobile app using the Hanko FIDO UAF Client, enabling on-device authentication on Android and iOS. Unlike the Hanko Authenticator, this scenario does not involve out-of-band communication. Instead of initiating communication on a desktop through a browser and confirming it in response to a notification on a mobile device, all communication originates from the mobile device and runs through your app’s backend, which passes information to the Hanko API.
Hanko FIDO UAF Client on-device use case
Get started with the Hanko FIDO UAF Client for Android or iOS

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Next steps

What is FIDO UAF?

Learn the background and core concepts behind the FIDO UAF protocol.

Core components

Understand the pieces that make up the Hanko Authenticator service.

Quickstart: Hanko Authenticator app

Register and authenticate devices with the out-of-band mobile app.

Quickstart: FIDO UAF Client SDK

Add on-device FIDO UAF authentication to your native Android or iOS app.