The Internet of Things (IoT) is a tremendously growing network that will affect our daily lives in every aspect. Therefore, the security of IoT needs to be carefully considered due to the size of the network. This book gives a well-organized survey on the security challenges and approaches in IoT. The contents include the system model, risk analysis, security mechanisms, and policy. Moreover, the authors also provide case studies of typical IoT applications such as vehicular ad hoc networks (VANETs), eHealth systems, and smart grids. The aforementioned contents depict a whole picture of current security issues and countermeasures for IoT.

In chapters 3 and 4, the authors illustrate the definitions with many figures. These figures are very helpful for understanding the difference between IoT and traditional networks. In chapters 4, 5, and 6, the authors go deeper in discussing the security challenges of IoT. The content here takes a top-level view, with less information about the specific protocols designed for solving security problems, such as cryptographic schemes. It would have been better if the book had provided more references on specific schemes, in order to relay the best knowledge about current research.

This is a very good book for beginners in the area of IoT security. It is also a useful comprehensive study for IoT users, engineers, and managers.