Mobile Forensics - The File Format Handbook: Common File Formats and File Systems Used in Mobile Devices (Paperback)

This open access book summarizes knowledge about several file systems and file formats commonly used in mobile devices. In addition to the fundamental description of the formats, there are hints about the forensic value of possible artefacts, along with an outline of tools that can decode the relevant data.

The book is organized into two distinct parts:

Part I describes several different file systems that are commonly used in mobile devices.

- APFS is the file system that is used in all modern Apple devices including iPhones, iPads, and even Apple Computers, like the MacBook series.

- Ext4 is very common in Android devices and is the successor of the Ext2 and Ext3 file systems that were commonly used on Linux-based computers.

- The Flash-Friendly File System (F2FS) is a Linux system designed explicitly for NAND Flash memory, common in removable storage devices and mobile devices, which Samsung Electronics developed in 2012.

- The QNX6 file system is present in Smartphones delivered by Blackberry (e.g. devices that are using Blackberry 10) and modern vehicle infotainment systems that use QNX as their operating system.

Part II describes five different file formats that are commonly used on mobile devices.

- SQLite is nearly omnipresent in mobile devices with an overwhelming majority of all mobile applications storing their data in such databases.

- The second leading file format in the mobile world are Property Lists, which are predominantly found on Apple devices.

- Java Serialization is a popular technique for storing object states in the Java programming language. Mobile application (app) developers very often resort to this technique to make their application state persistent.

- The Realm database format has emerged over recent years as a possible successor to the now ageing SQLite format and has begun to appear as part of some modern applications on mobile devices.

- Protocol Buffers provide a format for taking compiled data and serializing it by turning it into bytes represented in decimal values, which is a technique commonly used in mobile devices.

The aim of this book is to act as a knowledge base and reference guide for digital forensic practitioners who need knowledge about a specific file system or file format. It is also hoped to provide useful insight and knowledge for students or other aspiring professionals who want to work within the field of digital forensics. The book is written with the assumption that the reader will have some existing knowledge and understanding about computers, mobile devices, file systems and file formats.

本開放存取的書籍總結了關於移動裝置常用的幾種檔案系統和檔案格式的知識。除了對格式的基本描述外，還提供了有關可能證據價值的提示，以及可以解碼相關數據的工具概述。

本書分為兩個不同的部分：

第一部分描述了幾種常用於移動裝置的不同檔案系統。

- APFS 是所有現代蘋果設備（包括iPhone、iPad和甚至MacBook系列）使用的檔案系統。

- Ext4 在Android設備中非常常見，是Ext2和Ext3檔案系統的後繼者，這些檔案系統在基於Linux的電腦上常用。

- Flash-Friendly File System（F2FS）是一個專為NAND Flash記憶體設計的Linux系統，常見於可移動存儲設備和移動裝置，由三星電子於2012年開發。

- QNX6檔案系統存在於由Blackberry提供的智能手機（例如使用Blackberry 10的設備）和使用QNX作為操作系統的現代車載娛樂系統中。

第二部分描述了在移動裝置上常用的五種不同檔案格式。

- SQLite 幾乎無所不在地存在於移動裝置中，絕大多數移動應用程式將其數據存儲在這種數據庫中。

- 第二大流行的檔案格式是Property Lists，主要出現在蘋果設備上。

- Java Serialization 是一種在Java程式語言中存儲物件狀態的常用技術。移動應用程式開發人員經常使用這種技術來使其應用程式狀態持久化。

- Realm數據庫格式近年來作為SQLite格式的可能後繼者出現，並開始出現在一些現代移動應用程式中。

- Protocol Buffers 提供了一種格式，可以通過將編譯後的數據轉換為以十進制值表示的位元組序列來對其進行序列化，這是移動裝置中常用的一種技術。

本書的目的是作為數位鑑識從業人員的知識庫和參考指南，他們需要了解特定的檔案系統或檔案格式。同時，希望能為學生或其他有志於從事數位鑑識領域的專業人士提供有用的見解和知識。本書假設讀者對於電腦、移動裝置、檔案系統和檔案格式有一定的現有知識和理解。

Christian Hummert is the Chief Scientific Officer of the "Agentur für Innovation in der Cybersicherheit" in Halle, Germany. Prior to this, he was the Director of the Digital Forensics Department at ZITiS and was a Full Professor for IT-Security / Digital Forensics at the Mittweida University of Applied Science. He also is a guest lecturer at the Ludwig Maximilian University (LMU) in Munich. Christian has more than ten years of experience in digital forensics and worked for six years as a practitioner for the police. He led several research and development projects in the field and has taught digital forensics to students and practitioners at different institutions.

Dirk Pawlaszczyk is currently working as a Full Professor in the Department of Computer Sciences, Hochschule Mittweida - University of Applied Sciences. He has published more than 30 research papers in reputed international journals, including Springer and IEEE. His main research work focuses on digital forensics, network security, cloud security and privacy, IoT, distributed simulation, and artificial intelligence. He has ten years of teaching experience and twelve years of research experience.

Christian Hummert是德國哈雷「Agentur für Innovation in der Cybersicherheit」的首席科學官。在此之前，他曾擔任ZITiS數位取證部門的主任，並在Mittweida應用科學大學擔任IT安全/數位取證的全職教授。他還是慕尼黑的路德維希·馬克西米利安大學（LMU）的客座講師。Christian在數位取證領域擁有十多年的經驗，曾在警察機構擔任六年的從業人員。他領導過該領域的多個研究和開發項目，並在不同機構教授數位取證課程給學生和從業人員。

Dirk Pawlaszczyk目前在德國哈雷應用科學大學的計算機科學系擔任全職教授。他在知名國際期刊（包括Springer和IEEE）上發表了30多篇研究論文。他的主要研究工作集中在數位取證、網路安全、雲端安全和隱私、物聯網、分散式模擬和人工智慧等領域。他擁有十年的教學經驗和十二年的研究經驗。