The Internet of Things (IoT) is a rapidly growing network of physical devices that are connected to the internet and can collect and exchange data. It can potentially revolutionize many industries but also raises serious security concerns. This book provides a holistic overview of the security challenges and requirements of IoT. It starts by introducing the fundamentals of IoT security, such as the different types of threats and vulnerabilities. It then discusses the security lifecycle of IoT devices, from design and deployment to operation and maintenance. This book also covers a variety of security technologies and techniques that can be used to protect IoT devices, such as encryption, authentication, and access control.