As a newcomer to the topic of Cryptocurrencies, although not of some of the underlying technologies, I found the easiest way to get to grips with the overall content of this book was to turn to the section at the back entitled “What you have learned”. There I found a concise summary of the main points covered and how each of the chapters relate to one another as well as the overall topic.
The book is essentially written in two parts, the first covers the technology surrounding Cryptocurrencies, while the second deals with the practical forensic aspects of how evidence can be best collected, analysed and investigated.
An excellent description of cryptocurrency is provided in Chapter 1 together with an explanation of the problem the amalgamation of the associated technologies is trying to solve i.e. decentralising transactions, replacing them with a secure distributed system, typically suited for payments associated with currency as well as contracts etc. The concept of block chain working is introduced in this chapter and the reader is given the necessary information and PC instructions on how to set themselves up as a Bitcoin user.
Following this straightforward introduction to the topic, the next few chapters provide a deep dive into the supporting technologies i.e. hashing, encryption (both public and private key). This is followed by a chapter on the various nuances of the Blockchain. I found this chapter hard going but ultimately worthwhile in order to grasp the supporting fundamentals of Cryptocurrency and the investigative topics following later in the book. The role of the technology in supporting transactions, mining and wallets as well as short description of contracts and tokens make up the chapters which follow.
Part 2 – the investigative side of the book starts with Chapter 8. This deals with the evidential side of the topic discussing how to go about detecting cryptocurrencies, from searching premises to online searches and examining live computer systems. It is important to note that the legality of what is discussed in this chapter is left to the reader to determine!
Analysis of the information gleaned using the methods proposed are then the subject of the following text, leading into chapters dealing with locating suspects and monitoring an identified bitcoin node on a network. The penultimate chapter deals with the topic of the seizure of assets from a technical, not legal standpoint.
The book concludes with a short chapter dealing with the criminality aspect of Bitcoin use from buying and selling illegal goods to kidnap and extorsion payments using Cryptocurrency to hide the perpetrators tracks.
The book is clearly aimed at technical and forensic investigators but would also be of use to technical consultants needing to know about the investigation of any aspects involving blockchain technology for example contracts, documents, communications etc. I award the book 10 out of 10 for its topic coverage and overall ease of readability of the subject.
Review by Jim McGhie MBA, CEng, MBCS, CITP