How to Prevent Session Replay Attacks in Android & iOS Apps Using AI

Last updated March 13, 2025 by Appdome

This Knowledge Base article describes how to use Appdome’s AI/ML in your CI/CD pipeline to continuously deliver plugins that Prevent Session Replay Attack in Mobile apps.

What Are Session Replay Attacks?

A session replay attack occurs when an attacker intercepts and reuses a valid user’s session ID to impersonate them and take over their session. Mobile apps often store session tokens or authentication data to maintain user sessions, which can be hijacked if not properly secured. Attackers can capture these session tokens via network sniffing or man-in-the-middle attacks, allowing them to access user accounts without logging in again. Replay attacks can go unnoticed for long periods, enabling attackers to conduct fraudulent transactions, steal sensitive data, or make unauthorized changes. Detecting and preventing these attacks is difficult because the attacker is using valid session information. Defending against these attacks not only prevents financial loss and data breaches but also helps maintain regulatory compliance (e.g., PCI-DSS, GDPR). Additionally, session tokens that remain valid for extended periods present an increased risk of being reused undetected, making session replay protection vital for secure, uninterrupted user experiences.

How Appdome Protects Apps Against Session Replay Attacks?

Appdome dynamic Prevent Session Replay Attacks plugin detects and prohibits session replay attacks by reclaiming stale Session IDs in TLS sessions, preventing attackers from reusing them.

Prerequisites for Using Appdome's Prevent Session Replay Attack Plugins:

To use Appdome’s mobile app security build system to Prevent Session Replay Attack , you’ll need:

How to Implement Prevent Session Replay Attack in Mobile Apps Using Appdome

On Appdome, follow these simple steps to create self-defending Mobile Apps that Prevent Session Replay Attack 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. Mobile App Formats: .ipa for iOS, or .apk or .aab for Android
    3. Prevent Session Replay Attack is compatible with: Obj-C, Java, JS, C#, C++, Swift, Kotlin, Flutter, React Native, Unity, Xamarin, and more.
  2. Select the defense: Prevent Session Replay Attack.

      1. Create and name the Fusion Set (security template) that will contain the Prevent Session Replay Attack feature as shown below:
        fusion set that contains Prevent Session Replay Attack

        Figure 1: Fusion Set that will contain the Prevent Session Replay Attack feature

      2. Follow the steps in Sections 2.2-2.2.2 of this article to add the Prevent Session Replay Attack feature to your Fusion Set via the Appdome Console.

      3. When you enable Prevent MiTM Attacks you'll notice that the Fusion Set you created in step 2.1 now bears the icon of the protection category that contains Prevent Session Replay Attack.

        Fusion Set applied Prevent Session Replay Attack

        Figure 2: Fusion Set that displays the newly added Prevent Session Replay Attack 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 Prevent Session Replay Attack feature to your security template.

      1. Navigate to Build > Security tab > Secure Communication section in the Appdome Console.
      2. Toggle On Prevent MiTM Attacks > Prevent Session Replay Attack.
        Note: The checkmark feature Prevent Session Replay Attack is enabled by default, as shown below. Prevent Session Replay Attack option

        Figure 4: Selecting Prevent Session Replay Attack

    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 Prevent Session Replay Attack protection is now added to the mobile app
  3. Certify the Prevent Session Replay Attack feature in Mobile Apps

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

    Figure 5: 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 Prevent Session Replay Attack has been added to each Mobile app. Certified Secure provides instant and in-line DevSecOps compliance certification that Prevent Session Replay Attack and other mobile app security features are in each build of the mobile app.

Using Threat-Events™ for Session Replay Attack Intelligence and Control in Mobile Apps

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

The specifications and options for Threat-Events™ for Session Replay Attack are:

Threat-Event™ Elements Prevent Session Replay Attack Method Detail
Appdome Feature Name Prevent Session Replay Attack
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 Preventing Session Replay Attack Threat-Event™
Threat-Event NAME SslCertificateValidationFailed
Threat-Event DATA reasonData
Threat-Event CODE reasonCode
Threat-Event REF 6500
Threat-Event SCORE
currentThreatEventScore Current Threat-Event score
threatEventsScore Total Threat-events score
Threat-Event Context Keys
message Message displayed for the user on event
failSafeEnforce Timed enforcement against the identified threat
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.
carrierPlmn PLMN of the device. Only available for Android devices.
deviceID Current device ID
reasonCode Reason code of the occurred event
buildDate Appdome fusion date of the current application
devicePlatform OS name of the current device
carrierName Carrier name of the current device. Only available for Android.
updatedOSVersion Is the OS version up to date
deviceBrand Brand of the device
deviceBoard Board of the device
buildUser Build user
buildHost Build host
sdkVersion Sdk version
timeZone Time zone
deviceFaceDown Is the device face down
locationLong Location longitude conditioned by location permission
locationLat Location latitude conditioned by location permission
locationState Location state conditioned by location permission
wifiSsid Wifi SSID
wifiSsidPermissionStatus Wifi SSID permission status
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.
host The host that failed certificate validation
DeveventDetailedErrorMessage Error message
extendedMessageText Extended message
certificateCN Certificate common name
certificateSHA1 Certificate SHA1

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


The following is a code sample for native Mobile apps, which uses all values in the specification above for Prevent Session Replay Attack:


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 Mobile Apps by using Prevent Session Replay Attack. 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 Prevent Session Replay Attack

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.

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