Book Image

Android Application Security Essentials

By : Pragati Rai
Book Image

Android Application Security Essentials

By: Pragati Rai

Overview of this book

In today's techno-savvy world, more and more parts of our lives are going digital, and all this information is accessible anytime and anywhere using mobile devices. It is of the utmost importance that you understand and implement security in your apps that will reduce the likelihood of hazards that will wreck your users' experience. "Android Application Security Essentials" takes a deep look into Android security from kernel to the application level, with practical hands-on examples, illustrations, and everyday use cases. This book will show you how to overcome the challenge of getting the security of your applications right. "Android Application Security Essentials" will show you how to secure your Android applications and data. It will equip you with tricks and tips that will come in handy as you develop your applications.We will start by learning the overall security architecture of the Android stack. Securing components with permissions, defining security in a manifest file, cryptographic algorithms and protocols on the Android stack, secure storage, security focused testing, and protecting enterprise data on your device is then also discussed in detail. You will also learn how to be security-aware when integrating newer technologies like NFC and mobile payments into your Android applications. At the end of this book, you will understand Android security at the system level all the way to the nitty-gritty details of application security for securing your Android applications.
Table of Contents (18 chapters)
Android Application Security Essentials
About the Author
About the Reviewer

Application signing

One of the differentiating factors of Android is the way Android applications are signed. All applications in Android are self-signed. There is no requirement to sign the applications using a certificate authority. This is different from traditional application signing where a signature identifies the author and bases trust upon the signature.

The signature of the application associates the app with the author. If a user installs multiple applications written by the same author and these applications want to share each other's data, they need to be associated with the same signature and should have a SHARED_ID flag set in the manifest file.

The application signature is also used during the application upgrade. An application upgrade requires that both applications have the same signature and that there is no permission escalation. This is another mechanism in Android that ensures the security of applications.

As an application developer, it is important to keep the private key used to sign the application secure. As an application author, your reputation depends on it.