How to Encrypt Resources in Android Apps

Last updated April 25, 2024 by Appdome

Learn to Encrypt Encrypt Resources in Android apps, in mobile CI/CD with a Data-Driven DevSecOps™ build system.

What are Mobile Application Resources?

In Android apps, resource directories are places where the developer can add arbitrary files like text files, XML, HTML, fonts, music, and video to the application. These files, which are necessary for the app’s functionality and performance, are stored on the device under the application’s res/raw folder and used during runtime.

Why Should Developers Encrypt Application Resources in their Android Apps?

Users with privileged user access can easily read the resource’s contents. Appdome can encrypt these files using modern and standardized AES encryption, rendering them unreadable for malicious application users. The resources are decrypted when the application uses them to make sure that the app’s functionality doesn’t change. Potential attackers can easily access resources, and the resources include databases, texts, and other files that may contain sensitive information. Therefore, Encrypting Application Resources hardens the security of that information.

Prerequisites for Using Encrypt Resources:

To use Appdome’s mobile app security build system to Encrypt Encrypt Resources , you’ll need:

Encrypt Encrypt Resources on Android apps using Appdome

On Appdome, follow these 3 simple steps to create self-defending Android Apps that Encrypt Encrypt Resources without an SDK or gateway:

  1. Upload the Mobile App to Appdome.

    1. Upload an app to Appdome’s Mobile App Security Build System

    2. Upload Method: Appdome Console or DEV-API
    3. Android Formats: .apk or .aab
    4. Encrypt Resources Compatible With: Java, JS, C++, C#, Kotlin, Flutter, React Native, Unity, Xamarin, Cordova and other Android apps
  2. Build the feature: Encrypt Resources.

    1. Building Encrypt Resources by using Appdome’s DEV-API:

      1. Create and name the Fusion Set (security template) that will contain the Encrypt Resources feature as shown below:
      2. fusion set that contains Encrypt Resources

        Figure 1: Fusion Set that will contain the Encrypt Resources feature
        Note: Naming the Fusion Set to correspond to the protection(s) selected is for illustration purposes only (not required).

      3. Follow the steps in Sections 2.2.1-2.2.2 of this article, Building the Encrypt Resources feature via Appdome Console, to add the Encrypt Resources feature to this Fusion Set.

      4. Open the Fusion Set Detail Summary by clicking the “...” symbol on the far-right corner of the Fusion Set, as shown in Figure 1 above, and get the Fusion Set ID from the Fusion Set Detail Summary (as shown below): fusion Set Detail Summary image

        Figure 2: Fusion Set Detail Summary
        Note: Annotating the Fusion Set to identify the protection(s) selected is optional only (not mandatory).

      5. Follow the instructions below to use the Fusion Set ID inside any standard mobile DevOps or CI/CD toolkit like Bitrise, App Center, Jenkins, Travis, Team City, Cirlce CI or other system:
        1. Build an API for the app – for instructions, see the tasks under Appdome API Reference Guide
        2. Look for sample APIs in Appdome’s GitHub Repository
    2. Building the Encrypt Resources feature via Appdome Console

      To build the Encrypt Resources protection by using Appdome Console, follow the instructions below.

      1. Where: Inside the Appdome Console, go to Build > Security Tab > TOTALData™ Encryption section.
      2. When you select the Encrypt Resources you'll notice that your Fusion Set you created in step 2.1.1 now bears the icon of the protection category that contains Encrypt Resources

        Fusion Set applied Encrypt Resources

        Figure 4: Fusion Set that displays the newly added Encrypt Resources protection

      3. Click Build My App at the bottom of the Build Workflow (shown in Figure 3).
    Congratulations!  The Encrypt Resources protection is now added to the mobile app

Using Appdome, there are no development or coding prerequisites to build secured Android Apps by using Encrypt Resources. 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 Encrypt Resources

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:

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

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