Airlock 2FA is based on the Futurae cloud service. This makes the setup especially easy because no 3rd party 2FA solution needs to be installed or integrated.
The following diagram shows how the solution works in general. It also shows the involved components and how they interact.
The necessary Airlock 2FA app - a mobile app provided for iOS and Android - can be downloaded from the app store (or marketplace) and used right away. It is not necessary to implement a custom mobile app. If required, a custom mobile app can be made based on the SDK or the SDK can be used to enrich an existing mobile app with Airlock 2FA features.
Moreover, hardware tokens are available in cases where the usage of a mobile app is not appropriate.