O'Reilly logo

Android Security Cookbook by Scott Alexander-Bown, Keith Makan

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Application signature verification (anti-tamper)

One of the cornerstones of Android security is that all apps must be digitally signed. Application developers sign apps using a private key in the form of a certificate. There's no need to use a certificate authority, and in fact, it's more common to use self-signed certificates.

Certificates are usually defined with an expiration date, and the Google Play store requires a validity period ending after October 22, 2033. This highlights the fact that our app signing key stays consistent throughout the life of the app. One of the primary reasons is to protect and prevent app upgrades unless the signatures of the old and upgraded .apk files are identical.

So, if this verification already happens, why ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required