While the Industrial Internet of Things (IIoT) continues to redefine industrial infrastructure, the need for thriving Cybersecurity measures has never been more pressing. Cybersecurity of Industrial Internet of Things (IIoT) contends with the critical question of how to secure IIoT systems against the intensifying risks posed by cyber threats and attacks. This book is a fundamental guide for industrial leaders and professionals pursuing to understand and implement effective Cybersecurity solutions. It covers the fundamentals of cyber-physical systems (CPS), Internet of Things (IoT), and IT systems, while handing insights into prevailing and emerging cyber threats targeting industrial environments. This thorough resource connects theory and practice, providing a reasoned theoretical foundation upon practical knowledge. Each chapter builds a vital link between academic research and industry application, making it a valuable tool for both Cybersecurity professionals and industrial practitioners. With a focus on the latest hacking techniques, multidisciplinary standards, and regulatory frameworks, this book prepares readers with the skills and knowledge needed to protect their industrial infrastructure now and into the future. Key Features: Detailed exploration of industrial infrastructure architecture and communication protocols Understanding of traditional security methods and the threats facing IIoT systems Extensive analysis of IIoT vulnerabilities and effective countermeasures Inspection of reference frameworks, standards, and regulatory requirements for industrial cybersecurity Advisement on cybersecurity risk assessment methods and the implementation of protective measures This book is thoughtful for cybersecurity professionals working in cyber-physical systems and critical infrastructure domains, including smart cities, aerospace, manufacturing, etc. It is also a valuable resource for Chief Information Officers (CIOs), industrial engineers, and researchers engaged in industrial engineering. Whether you are a practitioner, a professional, or a student casting to upskill, Cybersecurity of Industrial Internet of Things (IIoT) provides the essential tools and insights to navigate the emerging perspective of industrial cybersecurity.