How to Detect Liveness Bypass in iOS Apps Using AI

Last updated August 27, 2025 by Appdome

This Knowledge Base article describes how to use Appdome’s AI in your CI/CD pipeline to continuously deliver plugins that Detect Liveness Bypass in iOS apps.

What Is Liveness Bypass?

Liveness Bypass attacks in iOS apps attempt to trick biometric systems into accepting fake inputs as evidence of a real user. Attackers inject prerecorded or synthetic video streams into AVFoundation buffers, exploit ReplayKit to replay footage, or use AirPlay mirroring to substitute live feeds. Jailbreak-based methods enable virtual camera creation or dylib injection to suppress or manipulate liveness checks, while enterprise-signed IPAs can be modified to auto-pass validation. These attacks enable fraudsters to bypass KYC controls and gain unauthorized access to sensitive accounts. The growing availability of AI-generated facial gestures, micro-movements, and eye-tracking simulations makes it increasingly difficult to separate real presence from synthetic input. Developers struggle because the attack focuses on runtime video validation, not static code, meaning detection requires real-time stream analysis and hardware-level verification.

How Appdome Protects iOS Apps Against Liveness Bypass

Appdome’s dynamic Detect Liveness Bypass plugin for iOS analyzes biometric workflows to verify that frames come from hardware camera input and detect synthetic or replayed video streams. It dynamically identifies ReplayKit misuse, AirPlay mirroring, simulator feed injection, and jailbreak-based dylib modifications that disable liveness. When bypass activity is found, the plugin can block authentication, require step-up verification, or terminate the session.

Prerequisites for Using Appdome's Detect Liveness Bypass Plugins:

To use Appdome’s mobile app security build system to Detect Liveness Bypass , you’ll need:

How to Implement Detect Liveness Bypass in iOS Apps Using Appdome

On Appdome, follow these 3 simple steps to create self-defending iOS Apps that Detect Liveness Bypass without an SDK or gateway:

  1. Designate the Mobile App to be protected.

    1. Upload an app via the Appdome Mobile Defense platform GUI or via Appdome’s DEV-API or CI/CD Plugins.

    2. iOS Formats: .ipa
    3. Detect Liveness Bypass is compatible with: Obj-C, Java, Swift, Flutter, React Native, Unity, Xamarin, Cordova and other iOS apps.
  2. Select the defense: Detect Liveness Bypass.

      1. Create and name the Fusion Set (security template) that will contain the Detect Liveness Bypass feature as shown below:
        fusion set that contains Detect Liveness Bypass

        Figure 1: Fusion Set that will contain the Detect Liveness Bypass feature

      2. Follow the steps in Sections 2.2-2.2.2 of this article to add the Detect Liveness Bypass feature to your Fusion Set via the Appdome Console.

      3. When you select the Detect Liveness Bypass you'll notice that the Fusion Set you created in step 2.1 now bears the icon of the protection category that contains Detect Liveness Bypass.

        Fusion Set applied Detect Liveness Bypass

        Figure 2: Fusion Set that displays the newly added Detect Liveness Bypass protection
        Note: Annotating the Fusion Set to identify the protection(s) selected is optional only (not mandatory).

      4. Open the Fusion Set Detail Summary by clicking the “...” symbol on the far-right corner of the Fusion Set. Copy the Fusion Set ID from the Fusion Set Detail Summary (as shown below): fusion Set Detail Summary image

        Figure 3: Fusion Set Detail Summary

      5. Follow the instructions below to use the Fusion Set ID inside any standard mobile DevOps or CI/CD toolkit like Bitrise, Jenkins, Travis, Team City, Circle CI or other system:
        1. Refer to the Appdome API Reference Guide for API building instructions.
        2. Look for sample APIs in Appdome’s GitHub Repository.
    1. Add the Detect Liveness Bypass feature to your security template.

      1. Navigate to Build > Anti ATO tab > Deepfake Detection section in the Appdome Console.
      2. Toggle On > Detect Liveness Bypass.

        (a) Choose to monitor this attack vector by checking the Threat Events checkbox associated with Detect Liveness Bypass as shown below.

        (b) To receive mobile Threat Monitoring, check the ThreatScope™ box as shown below. For more details, see our knowledge base article on ThreatScope™ Mobile XTM.
        Detect Liveness Bypass option

        Figure 4: Selecting Detect Liveness Bypass

        Note: The Appdome Platform displays the Mobile Operation Systems supported by each defense in real-time. For more details, see our OS Support Policy KB.

      3. Select the Threat-Event™ in-app mobile Threat Defense and Intelligence policy for Detect Liveness Bypass:
        1. Threat-Events™ OFF > In-App Defense

          If the Threat-Events™ setting is not selected. Appdome will detect and defend user and app by enforcing Detect Liveness Bypass.

        2. Threat-Events™ ON > In-App Detection

          When this setting is used, Appdome detects Liveness Bypass and passes Appdome’s Threat-Event™ attack intelligence to the app’s business logic for processing, enforcement, and user notification. For more information on consuming and using Appdome Threat-Events™ in the app, see section Using Threat-Events™ for Detect Liveness Bypass Intelligence and Control in Mobile Apps.

        3. Threat-Events™ ON > In-App Defense

          When this setting is used, Appdome detects and defends against Liveness Bypass (same as Appdome Enforce) and passes Appdome’s Threat-Event™ attack intelligence to the app’s business logic for processing. For more information on consuming and using Appdome Threat-Events™ in the app, see section Using Threat-Events™ for Detect Liveness Bypass Intelligence and Control in Mobile Apps.

      4. Configure the User Experience Options for Detect Liveness Bypass:
        With Threat-Events™ OFF, Appdome provides several user experience options for mobile brands and developers.
        1. App Compromise Notification: Customize the pop-up or toast Appdome uses to notify the user when a threat is present while using the protected mobile app.
        2. Short message Option. This is available for mobile devices that allow a banner notification for security events.
        3. Localized Message Option. Allows Appdome users to support global languages in security notifications.

          Localized Message

          Figure 5: Default User Experience Options for Appdome’s Liveness Bypass

        4. Detect Liveness Bypass Threat Code™. Appdome uses AI to generate a unique code each time Detect Liveness Bypass is triggered by an active threat on the mobile device. Use the code in Appdome Threat Resolution Center™ to help end users identify, find and resolve active threats on the personal mobile devices.
    2. Initiate the build command either by clicking Build My App at the bottom of the Build Workflow (shown in Figure 4) or via your CI/CD as described in Section 2.1.4.
    Congratulations!  The Detect Liveness Bypass protection is now added to the mobile app
  3. Certify the Detect Liveness Bypass feature in iOS Apps

    After building Detect Liveness Bypass, Appdome generates a Certified Secure™ certificate to guarantee that the Detect Liveness Bypass protection has been added and is protecting the app. To verify that the Detect Liveness Bypass protection has been added to the mobile app, locate the protection in the Certified Secure™ certificate as shown below: Detect Liveness Bypass shown in Certificate secure

    Figure 6: Certified Secure™ certificate

    Each Certified Secure™ certificate provides DevOps and DevSecOps organizations the entire workflow summary, audit trail of each build, and proof of protection that Detect Liveness Bypass has been added to each iOS app. Certified Secure provides instant and in-line DevSecOps compliance certification that Detect Liveness Bypass and other mobile app security features are in each build of the mobile app.

Using Threat-Events™ for Liveness Bypass Intelligence and Control in iOS Apps

Appdome Threat-Events™ provides consumable in-app mobile app attack intelligence and defense control when Liveness Bypass is detected. To consume and use Threat-Events™ for Liveness Bypass in iOS Apps, use AddObserverForName in Notification Center, and the code samples for Threat-Events™ for Liveness Bypass shown below.

The specifications and options for Threat-Events™ for Liveness Bypass are:

Threat-Event™ Elements Detect Liveness Bypass Method Detail
Appdome Feature Name Detect Liveness Bypass
Threat-Event Mode
OFF, IN-APP DEFENSE Appdome detects, defends and notifies user (standard OS dialog) using customizable messaging.
ON, IN-APP DETECTION Appdome detects the attack or threat and passes the event in a standard format to the app for processing (app chooses how and when to enforce).
ON, IN-APP DEFENSE Uses Appdome Enforce mode for any attack or threat and passes the event in a standard format to the app for processing (gather intel on attacks and threats without losing any protection).
Certified Secure™ Threat Event Check
Visible in ThreatScope™
Developer Parameters for Detecting Liveness Bypass Threat-Event™
Threat-Event NAME DetectLivenessBypass
Threat-Event DATA reasonData
Threat-Event CODE reasonCode
Threat-Event REF 7227
Threat-Event SCORE
currentThreatEventScore Current Threat-Event score
threatEventsScore Total Threat-events score
Threat-Event Context Keys
Timestamp The exact time the threat event was triggered, recorded in milliseconds since epoch
message Message displayed for the user on event
externalID The external ID of the event which can be listened via Threat Events
osVersion OS version of the current device
deviceModel Current device model
deviceManufacturer The manufacturer of the current device
fusedAppToken The task ID of the Appdome fusion of the currently running app
kernelInfo Info about the kernel: system name, node name, release, version and machine.
deviceID Current device ID
reasonCode Reason code of the occurred event
threatCode The last six characters of the threat code specify the OS, allowing the Threat Resolution Center to address the attack on the affected device.

With Threat-Events™ enabled (turned ON), iOS developers can get detailed attack intelligence and granular defense control in iOS applications and create amazing user experiences for all mobile end users when Liveness Bypass is detected.


The following is a code sample for native iOS apps, which uses all values in the specification above for Detect Liveness Bypass:


Important! Replace all placeholder instances of <Context Key> with the specific name of your threat event context key across all language examples. This is crucial to ensure your code functions correctly with the intended event data. For example, The <Context Key> could be the message, externalID, OS Version, reason code, etc.



Using Appdome, there are no development or coding prerequisites to build secured iOS Apps by using Detect Liveness Bypass. There is no SDK and no library to code or implement in the app and no gateway to deploy in your network. All protections are built into each app and the resulting app is self-defending and self-protecting.

Releasing and Publishing Mobile Apps with Detect Liveness Bypass

After successfully securing your app by using Appdome, there are several available options to complete your project, depending on your app lifecycle or workflow. These include:

Related Articles:

How Do I Learn More?

If you have any questions, please send them our way at support.appdome.com or via the chat window on the Appdome platform.

Thank you!

Thanks for visiting Appdome! Our mission is to secure every app on the planet by making mobile app security easy. We hope we’re living up to the mission with your project.

Want a Demo?

Deepfake Detection

AlanWe're here to help
We'll get back to you in 24 hours to schedule your demo.

Search Appdome Solutions

Search
Image Blog 2 Text

Device Binding in the Age of AI

For years, fraud prevention solutions have tried to use Device IDs to bind (or link) a user’s account or session to a specific device to prevent unauthorized access from other devices. However, until recently, Device IDs lacked persistence and the broad threat context needed to stop fraud and ATOs …