An encrypted message still starts and ends on a device. These articles examine the phone, browser, operating system and downloaded app as parts of the same security picture.
Learn what an APK checksum establishes, where app locks help, how recovery changes the trust boundary and why web and native messaging deserve separate questions.
QUESTIONS TO EXPLORE
↗ How do I verify an Android APK?
↗ What can an app lock protect?
↗ How does browser security differ from native messaging?