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Released Authenticator App 5.3

· 3 min read

We have released version 5.3 of the Authenticator App.

Android patch 5.3-14​

We have fixed an issue that was introduced in the initial 5.3 release, where the Authenticator App did not show the post-operation context after the end-user approved an operation with biometrics.

Instead, the app only showed the generic Operation completed! screen.

The fix is available in the updated 5.3 build, 5.3-14 (October 28 2026).

Encap SCA SDK upgrade​

We have upgraded the app to version 3.22 of the Encap SCA SDK. You can learn more about SDK 3.22 in the MobileID SDK release notes.

With this version, key exchange between the app and the server uses the X25519 algorithm.

Breaking change

From version 5.3, the Authenticator App requires an E2EE key that uses the X25519 algorithm. Existing E2EE keys that use the legacy SECT233K1 algorithm do not work with this version.

If your MobileID account only has SECT233K1 keys, then you need to add a new key with the X25519 algorithm. You can learn how to do this in the Add a new E2E key section of our End-to-end encryption feature documentation.

Improved support for larger text sizes​

This section is for iOS only

We have improved the app's layout for larger text sizes. When the end-user increases the text size in the device settings, all screens stay readable and usable.

Location permission only when needed​

This section is for Android only

The app now only asks the end-user for location permission when the location or SSID risk attributes are enabled in your application configuration.

Code shrinking for Google Play​

This section is for Android only

Google Play now checks whether an app's code is shrunk, obfuscated and optimised before release.

We built earlier versions of the app with code shrinking turned off, so the Google Play Console shows the warning 'DEX code optimization is below our threshold' with Shrinking (0%).

In version 5.3, we have turned on code shrinking, which makes the Android app smaller. Version 5.3 of the Authenticator App meets the Google Play threshold.

Google Play deadline

Google enforces this check from February 2027. This means that you need to publish version 5.3 or later of the Authenticator App to Google Play before then.

Improvements and bug fixes​

In this update, we have:

  • Updated the third-party SDKs used for identity verification and app protection to their latest versions.
  • Made general improvements and bug fixes, enhancing the app's overall stability, security and maintainability.