How to Use Google Play Signature Validation in Android Apps

Last updated November 28, 2024 by Appdome

This Knowledge Base article describes how to use Appdome’s AI/ML in your CI/CD pipeline to continuously deliver plugins that Validate Google Play Signature in Android apps.

Why Should Developers Protect Android Apps From Being Distributed on Alternative Appstores?

Fraudsters and other cyber-criminals often create fake apps by copying or cloning existing popular apps and then repackaging, re-signing, and re-distributing those apps on alternative, malicious, or non-approved app stores. There are many different methods, techniques, and motivations for why this is done.

Here are some of the top reasons cyber-criminals publish mobile apps on alternative app stores:

To create fakes, clones, or pirated copies of apps and then masquerade as the original app to divert advertising revenue to fraudulent entities or to generate in-app purchase revenue at the expense of the original app.
Embed malware or trojans inside a well-known app to trick users into downloading malware onto their mobile devices.
To create game mods to be used in mobile game cheating.
To create malicious apps that pose as helpful “utility” apps, such as battery-life extenders, QR code generators, calculators, or productivity apps. Once users are tricked into downloading these apps, the malicious apps often run in the background and monitor user activity or broadcast messages to learn what other apps the user has installed and also learn when they are using those other apps. The malicious app can then be used to phone home to a C&C botnet network to receive malware updates or to trigger screen overlay attacks at very precise times because the imposter app has been monitoring the user or device activity and knows what the user is doing.
For instance, to commit mobile click fraud or mobile ad fraud, sometimes these malicious apps monitor broadcast events about app installs and then generate a barrage of fake clicks at the very last minute to take credit for the app install.

Whatever their motivation, malicious actors find it fairly easy to publish fake, malicious, or pirated apps on app stores other than the Google Play Store. They simply download a target app (such as your app) on a Rooted mobile device, modify the app, and then repackage, re-sign, and re-distribute the fake or pirated mobile app to any app store they want.

What is Google Play Signature Validation?

Appdome Google Play Signature Validation validates that apps signed for Google Play Store cannot be distributed through any other app stores by preventing apps from being re-signed and re-distributed on app stores other than Google Play. If Appdome detects that an Android app has been downloaded from an app store other than Google Play, Appdome will prevent the app from running.

Prerequisites for Using Appdome's Google Play Signature Validation Plugins:

To use Appdome’s mobile app security build system to Validate Google Play Signature , you’ll need:

Appdome account (create a free Appdome account here)
A license for Google Play Signature Validation
Mobile App (.apk or .aab for Android)
Signing Credentials (see Signing Secure Android apps and Signing Secure iOS apps)

How to Implement Validate Google Play Signature in Android Apps Using Appdome

On Appdome, follow these 3 simple steps to create self-defending Android Apps that Validate Google Play Signature without an SDK or gateway:

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. Android Formats: .apk or .aab
3. Google Play Signature Validation is compatible with: Java, JS, C++, C#, Kotlin, Flutter, React Native, Unity, Xamarin, Cordova and other Android apps.
Select the defense: Google Play Signature Validation.

Create and name the Fusion Set (security template) that will contain the Google Play Signature Validation feature as shown below:

Figure 1: Fusion Set that will contain the Google Play Signature Validation feature

Follow the steps in Sections 2.2-2.2.2 of this article to add the Google Play Signature Validation feature to your Fusion Set via the Appdome Console.

When you select the Google Play Signature Validation you'll notice that the Fusion Set you created in step 2.1 now bears the icon of the protection category that contains Google Play Signature Validation.

Figure 2: Fusion Set that displays the newly added Google Play Signature Validation protection
Note: Annotating the Fusion Set to identify the protection(s) selected is optional only (not mandatory).

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):

Figure 3: Fusion Set Detail Summary

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:

Refer to the Appdome API Reference Guide for API building instructions.

Look for sample APIs in Appdome’s GitHub Repository.

Add the Google Play Signature Validation feature to your security template.

Navigate to Build > Anti Fraud tab > Social Engineering Prevention section in the Appdome Console.
Like all other options in ONEShield™, Google Play Signature Validation is turned on by default, as shown below:
Figure 4: Selecting Google Play Signature Validation
Note: The App Compromise Notification contains an easy to follow default remediation path for the mobile app end user. You can customize this message as required to achieve brand specific support, workflow or other messaging.

Toggle On > Google Play Signature Validation.

(a) Choose to monitor this attack vector by checking the Threat Events checkbox associated with Google Play Signature Validation 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 XDR.

Figure 4: Selecting Validate Google Play Signature
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.

Select the Threat-Event™ in-app mobile Threat Defense and Intelligence policy for Google Play Signature Validation:

Threat-Events™ OFF > In-App Defense
If the Threat-Events™ setting is not selected. Appdome will detect and defend the user and app by enforcing Google Play Signature.

Threat-Events™ ON > In-App Detection
When this setting is used, Appdome detects an attempt to run an app downloaded from a non-authorized App Store 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™ to Google Play Signature ValidationValidate Intelligence and Control in Mobile Apps.

Threat-Events™ ON > In-App Defense
When this setting is used, Appdome detects and defends against Google Play Signature (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 Google Play Signature ValidationValidate Intelligence and Control in Mobile Apps.

Configure the User Experience Options for Google Play Signature Validation:
With Threat-Events™ OFF, Appdome provides several user experience options for mobile brands and developers.

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.

Short message Option. This is available for mobile devices that allow a banner notification for security events.

Localized Message Option. Allows Appdome users to support global languages in security notifications.

Figure 5: Default User Experience Options for Appdome’s Google Play Signature

Google Play Signature Validation Threat Code™. Appdome uses AI/ML to generate a unique code each time Google Play Signature Validation 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.

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 Google Play Signature Validation protection is now added to the mobile app

Certify the Google Play Signature Validation feature in Android Apps

After building Google Play Signature Validation, Appdome generates a Certified Secure™ certificate to guarantee that the Google Play Signature Validation protection has been added and is protecting the app. To verify that the Google Play Signature Validation protection has been added to the mobile app, locate the protection in the Certified Secure™ certificate as shown below:

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 Google Play Signature Validation has been added to each Android app. Certified Secure provides instant and in-line DevSecOps compliance certification that Google Play Signature Validation and other mobile app security features are in each build of the mobile app.

Using Threat-Events™ for Google Play Signature Intelligence and Control in Android Apps

Appdome Threat-Events™ provides consumable in-app mobile app attack intelligence and defense control when Google Play Signature is detected. To consume and use Threat-Events™ for Google Play Signature in Android Apps, use registerReceiver in the Application OnCreate, and the code samples for Threat-Events™ for Google Play Signature shown below.

The specifications and options for Threat-Events™ for Google Play Signature are:

Threat-Event™ Elements Validate Google Play Signature Method Detail

Appdome Feature Name Google Play Signature Validation

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 Validating Google Play Signature Threat-Event™

Threat-Event NAME NotInstalledFromOfficialStore

Threat-Event DATA reasonData

Threat-Event CODE reasonCode

Threat-Event REF 6902

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.

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

The following is a code sample for native Android apps, which uses all values in the specification above for Google Play Signature Validation:

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.

IntentFilter intentFilter = new IntentFilter(); intentFilter.addAction("NotInstalledFromOfficialStore"); BroadcastReceiver threatEventReceiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { String message = intent.getStringExtra("message"); // Message shown to the user String reasonData = intent.getStringExtra("reasonData"); // Threat detection cause String reasonCode = intent.getStringExtra("reasonCode"); // Event reason code // Current threat event score String currentThreatEventScore = intent.getStringExtra("currentThreatEventScore"); // Total threat events score String threatEventsScore = intent.getStringExtra("threatEventsScore"); // Replace '' with your specific event context key // String variable = intent.getStringExtra(""); // Your logic goes here (Send data to Splunk/Dynatrace/Show Popup...) } }; if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) { registerReceiver(threatEventReceiver, intentFilter, Context.RECEIVER_NOT_EXPORTED); } else { registerReceiver(threatEventReceiver, intentFilter); }

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IntentFilter intentFilter = new IntentFilter();
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intentFilter.addAction("NotInstalledFromOfficialStore");
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BroadcastReceiver threatEventReceiver = new BroadcastReceiver() {
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@Override
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public void onReceive(Context context, Intent intent) {
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String message = intent.getStringExtra("message"); // Message shown to the user
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String reasonData = intent.getStringExtra("reasonData"); // Threat detection cause
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String reasonCode = intent.getStringExtra("reasonCode"); // Event reason code
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// Current threat event score
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String currentThreatEventScore = intent.getStringExtra("currentThreatEventScore");
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// Total threat events score
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String threatEventsScore = intent.getStringExtra("threatEventsScore");
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// Replace '<Context Key>' with your specific event context key
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// String variable = intent.getStringExtra("<Context Key>");
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// Your logic goes here (Send data to Splunk/Dynatrace/Show Popup...)
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}
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};
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if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
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registerReceiver(threatEventReceiver, intentFilter, Context.RECEIVER_NOT_EXPORTED);
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} else {
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registerReceiver(threatEventReceiver, intentFilter);
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}

val intentFilter = IntentFilter() intentFilter.addAction("NotInstalledFromOfficialStore") val threatEventReceiver = object : BroadcastReceiver() { override fun onReceive(context: Context?, intent: Intent?) { var message = intent?.getStringExtra("message") // Message shown to the user var reasonData = intent?.getStringExtra("reasonData") // Threat detection cause var reasonCode = intent?.getStringExtra("reasonCode") // Event reason code // Current threat event score var currentThreatEventScore = intent?.getStringExtra("currentThreatEventScore") // Total threat events score var threatEventsScore = intent?.getStringExtra("threatEventsScore") // Replace '' with your specific event context key // var variable = intent?.getStringExtra("") // Your logic goes here (Send data to Splunk/Dynatrace/Show Popup...) } } if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) { registerReceiver(threatEventReceiver, intentFilter, Context.RECEIVER_NOT_EXPORTED) } else { registerReceiver(threatEventReceiver, intentFilter) }

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val intentFilter = IntentFilter()
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intentFilter.addAction("NotInstalledFromOfficialStore")
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val threatEventReceiver = object : BroadcastReceiver() {
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override fun onReceive(context: Context?, intent: Intent?) {
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var message = intent?.getStringExtra("message") // Message shown to the user
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var reasonData = intent?.getStringExtra("reasonData") // Threat detection cause
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var reasonCode = intent?.getStringExtra("reasonCode") // Event reason code
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// Current threat event score
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var currentThreatEventScore = intent?.getStringExtra("currentThreatEventScore")
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// Total threat events score
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var threatEventsScore = intent?.getStringExtra("threatEventsScore")
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// Replace '<Context Key>' with your specific event context key
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// var variable = intent?.getStringExtra("<Context Key>")
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// Your logic goes here (Send data to Splunk/Dynatrace/Show Popup...)
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}
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}
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if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
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registerReceiver(threatEventReceiver, intentFilter, Context.RECEIVER_NOT_EXPORTED)
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} else {
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registerReceiver(threatEventReceiver, intentFilter)
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}

const { ADDevEvents } = NativeModules; const aDDevEvents = new NativeEventEmitter(ADDevEvents); function registerToDevEvent(action, callback) { NativeModules.ADDevEvents.registerForDevEvent(action); aDDevEvents.addListener(action, callback); } export function registerToAllEvents() { registerToDevEvent( "NotInstalledFromOfficialStore", (userinfo) => Alert.alert(JSON.stringify(userinfo)) var message = userinfo["message"] // Message shown to the user var reasonData = userinfo["reasonData"] // Threat detection cause var reasonCode = userinfo["reasonCode"] // Event reason code // Current threat event score var currentThreatEventScore = userinfo["currentThreatEventScore"] // Total threat events score var threatEventsScore = userinfo["threatEventsScore"] // Replace '' with your specific event context key // var variable = userinfo[""] // Your logic goes here (Send data to Splunk/Dynatrace/Show Popup...) ); }

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const { ADDevEvents } = NativeModules;
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const aDDevEvents = new NativeEventEmitter(ADDevEvents);
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function registerToDevEvent(action, callback) {
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NativeModules.ADDevEvents.registerForDevEvent(action);
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aDDevEvents.addListener(action, callback);
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}
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export function registerToAllEvents() {
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registerToDevEvent(
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"NotInstalledFromOfficialStore",
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(userinfo) => Alert.alert(JSON.stringify(userinfo))
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var message = userinfo["message"] // Message shown to the user
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var reasonData = userinfo["reasonData"] // Threat detection cause
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var reasonCode = userinfo["reasonCode"] // Event reason code
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// Current threat event score
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var currentThreatEventScore = userinfo["currentThreatEventScore"]
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// Total threat events score
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var threatEventsScore = userinfo["threatEventsScore"]
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// Replace '<Context Key>' with your specific event context key
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// var variable = userinfo["<Context Key>"]
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// Your logic goes here (Send data to Splunk/Dynatrace/Show Popup...)
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);
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}

RegisterReceiver(new ThreatEventReceiver(), new IntentFilter("NotInstalledFromOfficialStore")); class ThreatEventReceiver : BroadcastReceiver { public override void OnReceive(Context context, Intent intent) { String message = intent.GetStringExtra("message"); // Message shown to the user String reasonData = intent.GetStringExtra("reasonData"); // Threat detection cause String reasonCode = intent.GetStringExtra("reasonCode"); // Event reason code // Current threat event score String currentThreatEventScore = intent.GetStringExtra("currentThreatEventScore"); // Total threat events score String threatEventsScore = intent.GetStringExtra("threatEventsScore"); // Replace '' with your specific event context key // String variable = intent.GetStringExtra(""); // Your logic goes here (Send data to Splunk/Dynatrace/Show Popup...) } }

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RegisterReceiver(new ThreatEventReceiver(), new IntentFilter("NotInstalledFromOfficialStore"));
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class ThreatEventReceiver : BroadcastReceiver
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{
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public override void OnReceive(Context context, Intent intent)
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{
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// Message shown to the user
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String message = intent.GetStringExtra("message");
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// Threat detection cause
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String reasonData = intent.GetStringExtra("reasonData");
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// Event reason code
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String reasonCode = intent.GetStringExtra("reasonCode");
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// Current threat event score
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String currentThreatEventScore = intent.GetStringExtra("currentThreatEventScore");
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// Total threat events score
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String threatEventsScore = intent.GetStringExtra("threatEventsScore");
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// Replace '<Context Key>' with your specific event context key
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// String variable = intent.GetStringExtra("<Context Key>");
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// Your logic goes here (Send data to Splunk/Dynatrace/Show Popup...)
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}
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}

NSNotificationCenter.DefaultCenter.AddObserver( (NSString)"NotInstalledFromOfficialStore", // Threat-Event Identifier delegate (NSNotification notification) { // Message shown to the user var message = notification.UserInfo.ObjectForKey("message"); // Threat detection cause var reasonData = notification.UserInfo.ObjectForKey("reasonData"); // Event reason code var reasonCode = notification.UserInfo.ObjectForKey("reasonCode"); // Current threat event score var currentThreatEventScore = notification.UserInfo.ObjectForKey("currentThreatEventScore"); // Total threat events score var threatEventsScore = notification.UserInfo.ObjectForKey("threatEventsScore"); // Replace '' with your specific event context key // var variable = notification.UserInfo.ObjectForKey(""); // Your logic goes here (Send data to Splunk/Dynatrace/Show Popup...) } );

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NSNotificationCenter.DefaultCenter.AddObserver(
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(NSString)"NotInstalledFromOfficialStore", // Threat-Event Identifier
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delegate (NSNotification notification)
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{
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// Message shown to the user
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var message = notification.UserInfo.ObjectForKey("message");
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// Threat detection cause
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var reasonData = notification.UserInfo.ObjectForKey("reasonData");
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// Event reason code
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var reasonCode = notification.UserInfo.ObjectForKey("reasonCode");
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// Current threat event score
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var currentThreatEventScore = notification.UserInfo.ObjectForKey("currentThreatEventScore");
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// Total threat events score
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var threatEventsScore = notification.UserInfo.ObjectForKey("threatEventsScore");
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// Replace '<Context Key>' with your specific event context key
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// var variable = notification.UserInfo.ObjectForKey("<Context Keys>");
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// Your logic goes here (Send data to Splunk/Dynatrace/Show Popup...)
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}
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);

window.broadcaster.addEventListener("NotInstalledFromOfficialStore", function(userInfo) { var message = userInfo.message // Message shown to the user var reasonData = userInfo.reasonData // Threat detection cause var reasonCode = userInfo.reasonCode // Event reason code // Current threat event score var currentThreatEventScore = userInfo.currentThreatEventScore // Total threat events score var threatEventsScore = userInfo.threatEventsScore // Replace '' with your specific event context key // var variable = userInfo. // Your logic goes here (Send data to Splunk/Dynatrace/Show Popup...) });

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window.broadcaster.addEventListener("NotInstalledFromOfficialStore", function(userInfo) {
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var message = userInfo.message // Message shown to the user
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var reasonData = userInfo.reasonData // Threat detection cause
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var reasonCode = userInfo.reasonCode // Event reason code
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// Current threat event score
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var currentThreatEventScore = userInfo.currentThreatEventScore
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// Total threat events score
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var threatEventsScore = userInfo.threatEventsScore
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// Replace '<Context Key>' with your specific event context key
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// var variable = userInfo.<Context Keys>
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// Your logic goes here (Send data to Splunk/Dynatrace/Show Popup...)
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});

import 'dart:async'; import 'package:flutter/material.dart'; import 'package:flutter/services.dart'; class PlatformChannel extends StatefulWidget { const PlatformChannel({super.key}); @override State createState() => _PlatformChannelState(); } class _PlatformChannelState extends State { // Replace with your EventChannel name static const String _eventChannelName = "NotInstalledFromOfficialStore"; static const EventChannel _eventChannel = EventChannel(_eventChannelName); @override void initState() { super.initState(); _eventChannel.receiveBroadcastStream().listen(_onEvent, onError: _onError); } void _onEvent(Object? event) { setState(() { // Adapt this section based on your specific event data structure var eventData = event as Map; // Example: Accessing 'externalID' field from the event var externalID = eventData['externalID']; // Customize the rest of the fields based on your event structure String message = eventData['message']; // Message shown to the user String reasonData = eventData['reasonData']; // Threat detection cause String reasonCode = eventData['reasonCode']; // Event reason code // Current threat event score String currentThreatEventScore = eventData['currentThreatEventScore']; // Total threat events score String threatEventsScore = eventData['threatEventsScore']; // Replace '' with your specific event context key // String variable = eventData['']; }); } // Your logic goes here (Send data to Splunk/Dynatrace/Show Popup...) }

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import 'dart:async';
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import 'package:flutter/material.dart';
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import 'package:flutter/services.dart';
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class PlatformChannel extends StatefulWidget {
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const PlatformChannel({super.key});
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@override
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State<PlatformChannel> createState() => _PlatformChannelState();
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}
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class _PlatformChannelState extends State<PlatformChannel> {
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// Replace with your EventChannel name
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static const String _eventChannelName = "NotInstalledFromOfficialStore";
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static const EventChannel _eventChannel = EventChannel(_eventChannelName);
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@override
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void initState() {
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super.initState();
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_eventChannel.receiveBroadcastStream().listen(_onEvent, onError: _onError);
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}
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void _onEvent(Object? event) {
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setState(() {
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// Adapt this section based on your specific event data structure
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var eventData = event as Map;
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// Example: Accessing 'externalID' field from the event
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var externalID = eventData['externalID'];
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// Customize the rest of the fields based on your event structure
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String message = eventData['message']; // Message shown to the user
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String reasonData = eventData['reasonData']; // Threat detection cause
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String reasonCode = eventData['reasonCode']; // Event reason code
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// Current threat event score
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String currentThreatEventScore = eventData['currentThreatEventScore'];
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// Total threat events score
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String threatEventsScore = eventData['threatEventsScore'];
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// Replace '<Context Key>' with your specific event context key
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// String variable = eventData['<Context Keys>'];
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});
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}
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// Your logic goes here (Send data to Splunk/Dynatrace/Show Popup...)
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}

Using Appdome, there are no development or coding prerequisites to build secured Android Apps by using Google Play Signature Validation. 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 Google Play Signature Validation

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:

Customizing, Configuring & Branding Secure Mobile Apps.

Deploying/Publishing Secure mobile apps to Public or Private app stores.

Releasing Secured Android & iOS Apps built on Appdome.

Related Articles:

How to Troubleshoot App Signing in Secured Android & iOS Apps

Binary Code Obfuscation, Anti-Reversing for Android & iOS Apps

How to Prevent Code Tampering in Android & iOS Apps

How to Prevent Code Injection & Process Injection Attacks in Mobile Apps

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.

How to Use Google Play Signature Validation in Android Apps

Why Should Developers Protect Android Apps From Being Distributed on Alternative Appstores?

What is Google Play Signature Validation?

Prerequisites for Using Appdome's Google Play Signature Validation Plugins:

How to Implement Validate Google Play Signature in Android Apps Using Appdome

Designate the Mobile App to be protected.

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

Select the defense: Google Play Signature Validation.

Add the Google Play Signature Validation feature to your security template.

Certify the Google Play Signature Validation feature in Android Apps

Using Threat-Events™ for Google Play Signature Intelligence and Control in Android Apps

Related Articles:

How Do I Learn More?

Thank you!

Stop AI-Based Attacks While Automating PCI DSS 4.0 Compliance

Supercharge the Experience in Mobile App Defense

Better User Experience in Mobile Defense

Shifting Dynamics in Mobile Fraud Prevention: A Call for Developer Responsibility

Threat-Event™ Elements	Validate Google Play Signature Method Detail
Appdome Feature Name	Google Play Signature Validation
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 Validating Google Play Signature Threat-Event™
Threat-Event NAME	NotInstalledFromOfficialStore
Threat-Event DATA	reasonData
Threat-Event CODE	reasonCode
Threat-Event REF	6902
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.