Android App Security · Course 1
Inside an APK
Open an Android app and see what it's made of and who signed it.
- 1What's in an APK12 min · Unzip a real-looking app package and learn what each part does.
- 2The Manifest12 min · Read an app's manifest to see what it asks for and which doors it opens.
- 3Signing & Updates13 min · Learn why every app is signed and how the signature decides who can update it.
- 4Where Apps Come From13 min · Compare app sources and learn the checks to run before you tap Install.
- 5Challenge: The Free Premium Vault15 min · Investigate a 'free premium' app your uncle found and decide if it's real.
Hands-on
Do it on the simulated phone
Every lesson has a lab you can try in your browser, plus questions that earn points toward the Unpacker badge.
Start lesson 1