New DEX Protection Features

Action Required: Apply ProGuard/R8 obfuscation before app sealing
Before enabling the new Dex protection, make sure ProGuard/R8 symbol obfuscation is applied to main code. Using ProGuard/R8 together with Dex protection provides the strongest security.

  • String Obfuscation: This feature protects strings hardcoded within the app`s Android source code from being exposed externally.
    This prevents hackers or analysis tools from easily uncovering sensitive information even when examining the code, thereby enhancing the security level of apps and services.

  • Call Hiding: Conceals critical function calls, making it difficult for external code analysis to trace internal operational flows.
    Consequently, this reduces the risk of exposing the app's core logic and strengthens security.

  • You can choose the obfuscation level when using new features. (Fast/Balance/Maximum)

  • Please refer developer document to find CLI tool options for new features.

App Loading Performance Optimization

  • We improved app startup performance significantly by adopting Dex obfuscation as a core technique. As a result, ANR issues reported during the initialization phase have also been mitigated.

Security Module Hardening

  • We implement native code obfuscation based on the OLLVM technology.

  • This strengthens the module's ability to counter attempts at static analysis or runtime behavior tracking, enabling more secure protection of the security module.

Sealing Performance Improvements

  • The security server architecture has been improved, resulting in faster sealing speeds. This is especially efficient when handling large file sizes.

  • The server structure has been optimized for parallel processing, enabling rapid and efficient handling of simultaneous sealing requests from multiple users.

Developer Note

  • You can check FAQ of new version at this help center document.

  • The new version will be available only in the Global region at launch. It will roll out to the Mumbai and Jakarta regions between December and January.

  • React Native is not supported in the new version. To continue RN protection until the new version is updated, please use version 1.7.10.1.

  • For hybrid apps other than RN, selecting Native and using version 3.0.0.0 will maintain the same security level as before.

  • Due to enhanced security, the size of the APK/AAB after sealing has increased compared to previous versions.

  • 06/Jan/2026 Additional note: Not supported sealing options in 3.0.0.0

    • Dex Encryption

    • Dex String Encryption

    • Block Dex Dump

    • Protect Unity Metadata

    • Use QUERY_ALL_PACKAGES

    • Data Sealing