Digital Forensics for Handheld Devices

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Approximately 80 percent of the world ��s population now owns a cell phone, which can hold evidence or contain logs about communications concerning a crime. Cameras, PDAs, and GPS devices can also contain information related to corporate policy infractions and crimes. Aimed to prepare investigators in the public and private sectors, Digital Forensics for Handheld Devices examines both the theoretical and practical aspects of investigating handheld digital devices. This book touches on all areas of mobile device forensics, including topics from the legal, technical, academic, and social aspects of the discipline. It provides guidance on how to seize data, examine it, and prepare it as evidence for court. This includes the use of chain of custody forms for seized evidence and Faraday Bags for digital devices to prevent further connectivity and tampering of evidence. Emphasizing the policies required in the work environment, the author provides readers with a clear understanding of the differences between a corporate investigation and a criminal investigation. The book also: Offers best practices for establishing an incident response policy and seizing data from company or privately owned digital devices Provides guidance in establishing dedicated examinations free of viruses, spyware, and connections to other devices that could taint evidence Supplies guidance on determining protocols for complicated crime scenes with external media and devices that may have connected with the handheld device Considering important privacy issues and the Fourth Amendment, this book facilitates an understanding of how to use digital forensic tools to investigate the complete range of available digital devices, including flash drives, cell phones, PDAs, digital cameras, and netbooks. It includes examples of commercially available digital forensic tools and ends with a discussion of the education and certifications required for various careers in mobile device forensics.

Digital Forensics for Handheld Devices Review

Today's handheld device is the mainframe of years past. An iPhone 5 with 64 GB of storage and the Apple A6 system-on-a-chip processor has more raw computing power entire data centers had some years ago.

With billions of handheld devices in use worldwide, it is imperative that digital forensics investigators and others know how to ensure that the information contained in them, can be legally preserved if needed.

In Digital Forensics for Handheld Devices, author Eamon Doherty provides an invaluable resource on how one can obtain data, examine it and prepare it as evidence for court. One of the reasons many computer crime cases fail to be prosecuted is that the evidence was not properly handled and could therefore not be admitted into court.

Once of the first things a defense attorney will do in a computer crime case is to attack how the digital evidence was obtained and preserved. In far too many cases, it was done incorrectly and the evidence, no matter that it may be a smoking gun, can't be admitted into court. The case then is dismissed, to the chagrin of the victim.

The books 8 chapters of nearly 300 pages are densely packed text, where Doherty brings significant real-world experience to every chapter. As the cybercrime training lab director at Fairleigh Dickinson University, he brings both an academic formality in additional to real-world experience in this highly tactical guide.

Chapter 1 details cell phone forensics. After a brief introduction to the history of the cell phone, it details the entire inner workings of a cell phone. The chapter also details differences in cell phones worldwide. An important fact is that many Asian countries have cell phones available 12-18 months before they appear in the US. With that, American forensic investigators need to be cognizant of this when entering into an investigation.

The chapter includes an overview of the Susteen Secure View application which is an extremely powerful tool for the mobile phone forensic investigator. Besides that tool, in each chapter, Doherty lists many tools that provide specific assistance to the topic at hand. The book is worth it for those listings alone.
Chapter 2 is similar to the previous chapter except this is about digital camera forensics. The chapter provides a detailed overview of how digital cameras operate and how the underlying hardware works. The chapter includes an extremely comprehensive overview of seemingly every tool available to investigate images on a digital camera.

The chapter also includes a number of fascinating case studies on how to effectively perform a forensics analysis of a digital camera. It concludes with an observation that when considering a career in forensics, as fascinating as it is; it may not be for everyone.

Doherty notes that as a forensics investigator, the examiner is often exposed to disturbing material. He quotes a report that studied investigators from over 500 agencies who had been exposed to child pornography during investigation of crime involving child exportation. The report noted an alarming 35% of the participants had problems arising from work exposure to child pornography.

Chapter 5 provides an extremely detailed look at forensics investigation on a corporate network. Throughout the book, Doherty stresses the need for effective chain of custody and other issues to preserve digital evidence. It is imperative to preserve the integrity of the digital evidence obtained from the time it was seized until it is presented in court.

To facilitate this, the book states a best practice to use checklists to ensure nothing is forgotten. The importance of checklists has been detailed in The Checklist Manifesto: How to Get Things Right where author Atul Gawande makes a compelling case for the use of checklists.

As to evidence and checklists, Doherty writes that once the evidence is obtained, a chain of custody form should be filled out. Each time the evidence is copied, processed, or transported, it should be documented on the chain of custody form. If others receive a copy of the evidence for prosecution or defense purposes, they too should sign for it. This is an imperative if it expected that the evidence would end up in court or be used for human resources purposes. But at the corporate setting detailed in chapter 5, that same level of diligence is not necessarily required.

Chapter 5 also has overviews of nearly 50 different forensic tools for every imaginable purpose.
While the book has exploratory and technical overviews on many tools and numerous case studies, this is not an introductory text on the subject. It is meant for someone with a technical background that is looking for a technical reference to gain competence on the topic of digital forensics.

The only lacking of the book is that while the author is an expert on the topic and the tools, the writing style is one that screams out for an editor. The text suffers from run on sentences and repetition of defining the same acronym, in addition to other readability issues. The book is pervasive its use of passive voice that can be annoying to many readers. It is hoped that the second edition of this book will be updated with the current tools of the time and a good re-editing of the text to ensure its readability doesn't suffer.

Aside from the grammatical issues, for those looking for a very hands-on guide to gain proficiency on the topic, Digital Forensics for Handheld Devices is a valuable reference. Dr. Eamon Doherty has a unique perspective in that he has academic, law enforcement and very practical experience, which is manifest in every chapter.

The notion of digital forensics is seize it, examine it and then prepare it for evidence in court. In Digital Forensics for Handheld Devices, you found out how to do just that.

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