Book Image

Mastering Mobile Forensics

By : Soufiane Tahiri
Book Image

Mastering Mobile Forensics

By: Soufiane Tahiri

Overview of this book

Mobile forensics presents a real challenge to the forensic community due to the fast and unstoppable changes in technology. This book aims to provide the forensic community an in-depth insight into mobile forensic techniques when it comes to deal with recent smartphones operating systems Starting with a brief overview of forensic strategies and investigation procedures, you will understand the concepts of file carving, GPS analysis, and string analyzing. You will also see the difference between encryption, encoding, and hashing methods and get to grips with the fundamentals of reverse code engineering. Next, the book will walk you through the iOS, Android and Windows Phone architectures and filesystem, followed by showing you various forensic approaches and data gathering techniques. You will also explore advanced forensic techniques and find out how to deal with third-applications using case studies. The book will help you master data acquisition on Windows Phone 8. By the end of this book, you will be acquainted with best practices and the different models used in mobile forensics.
Table of Contents (14 chapters)
Mastering Mobile Forensics
About the Author
About the Reviewer
Preparing a Mobile Forensic Workstation

Bypassing security

Without any doubt, lock screens represent the very first starting point in every mobile forensic examination. As for all smartphone OSes, Android offers a way to control access to a given device by requiring user authentication; the problem with recent implementations of lock screens in modern operating systems, in general and in Android (since it is the point of interest of this chapter), is that beyond controlling access to the system user interface and applications, lock screens have now been extended to more fancy (showing widgets, switching users in multi-users devices, and so on) and forensically challenging features, such as unlocking the system keystore, to derive the key-encryption key (used with the disk encryption key), and the credential storage encryption key.

The problem with bypassing lock screens (also called keyguards) is that techniques that can be used are very version/device dependent, thus there is neither a generalized method nor a technique that...