TrustID Authenticator allows you to setup a second authentication factor to protect your accounts using TrustID services. The app itself is protected by biometrics (or PIN code). Sensitive data, such as the secret of your second factor, is stored securely on your device only. When you access to a service using your TrustID account, a push notification will be sent to your app that lets you confirm or cancel the sign in process in an effortless way. If the notification service is unavailable, a traditional offline mode can be used to not miss the sign in session.