Preliminary Exploration of the Android Apk decryption project-preface, keywords, and decryption Environment

Preface:

The struggle for encryption and decryption has never been stopped since software was available and will continue. Of course, the Android Apk application cannot be an exception. Next, we will discuss the Apk encryption and decryption on the Android platform. This series is designed to use the idea of encryption and decryption to explore the most basic mode of Android Apk cracking. Through the decryption process, let everyone know how to effectively prevent crack when writing their own apk.

In order to reflect the most basic principle, this article uses the self-written apk as an example. In this way, other readers will also use these crackme apk for decryption exercises.

Keywords: Android Apk encryption/Decryption cracking reverse engineering decryption environment:

1. Ununtu 10.04 installed in VMware

2. Java jdk 1.6

3. Android Virtual Machine

Tools outside the system:

Apktool decompilation APK Tool

Signapk signature APK Tool

On Windows platforms, friends who may have played crack may know many tools, such as TRW2000 and W32DASM.

On the Android platform, many decryption tools such as Apktool and dex2jar are used and there are many methods to use on the network. We will not repeat them here. For details, refer to Google.