How to Encrypt Strings.xml in Android Apps, Protect App Data

Last updated May 18, 2021 by Gil Hartman


Learn 3 Easy Steps to Encrypt Strings.xml in Android apps. This protects sensitive string data stored in Android apps

The soft belly of any application are the strings and resources that can be easily understood from the application without using specialized tools, for example phrases, URLs, tokens, passwords etc. Unlike the java strings and the assets folder which are encrypted by Appdome Strings and Resources encryption, the string resources, usually under strings.xml file, can’t be encrypted on the device because the OS needs to access it. This KB article provides step by step instructions on how to encrypt Sensitive strings.xml values in Android apps.

To provide our customers overall security protection of their Android app, Appdome’s XMLEncrypt™ service encrypts the sensitive strings stored in the localizable locations in Android. Now you can easily enhance the security of your app against malicious attempts to read the app’s content.

We hope you find it useful and enjoy using Appdome!

How Encrypting ‘Strings.xml’ in Android Apps Protects Mobile App Data

In Android apps, the strings.xml is often used by the OS (i.e. to show the application display name and to hold the localizable string resources). Additionally, it is common for mobile app developers to store all the app strings including sensitive data and values inside this folder. Since the strings.xml file can’t be encrypted as a whole, Appdome’s XMLEncryptTM   provides a way for customers to encrypt all the sensitive strings in the strings.xml folder that are not used in the app manifest or by the OS.

As seen in the screenshot below the XMLEncryptTM service replaces the sensitive strings with XXXX. Strings from the android support library and other google public libraries will not be encrypted.

Appdome is a no-code mobile app security platform designed to add security features, like string encryption, to Android apps without coding.  This KB shows mobile developers, DevSec and security professionals how to use Appdome’s simple ‘click to build’ user interface to quickly and easily protect sensitive data in Android apps. 

3 Easy Steps to Encrypt Strings.xml in Android apps

Follow these 3 easy steps to Encrypt Strings.xml in Android apps

Start by adding a mobile app to your Appdome account. If you don’t have an Appdome account, click here to create an account.

  1. Click Build, then select Security
  2. Switch on XMLEncryptTM
  3. Click Build My App.

encrypt strings.xml in android apps

Appdome’s no-code mobile app security platform offers mobile developers, DevSec and security professionals a convenient and reliable way to protect Android and iOS apps with string encryption. When an Appdome user clicks “Build My App,” Appdome leverages a microservice architecture filled with 1000s of security plugins, and an adaptive code generation engine that matches the correct required plugins to the development environment, frameworks, and methods in each app.

Prerequisites for XMLEncrypt:

In order to use Appdome’s no code implementation of XMLEncrypt, you’ll need:

  • Appdome account
  • Mobile App (.ipa for iOS, or .apk or .aab for Android)
  • Signing Credentials (e.g., signing certificates and provisioning profile)

No Coding Dependency

Using Appdome, there are no development or coding prerequisites to build secured apps with strings encryption. There is no SDK and no library to manually code or implement in the app. The Appdome technology adds the relevant standards, frameworks, and logic to the app automatically, with no manual development work at all.

How to Sign & Publish Secured Mobile Apps Built on Appdome  

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

Or, see this quick reference Releasing Secured Android & iOS Apps built on Appdome. 

 How to Learn More

Check out Appdome’s TOTALData Encryption

Check out the full menu of features in the Appdome Mobile Security Suite

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

Or request a demo at any time.

Thank you!

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