This book explores Internet of Medical Things (IoMT) security and privacy in electronic healthcare, addressing vulnerabilities in medical devices that expose patient data to cyber-attacks. It covers IoMT security challenges, potential attacks, and solutions considering resource constraints, network architecture, and communication protocols. IoMT is revolutionizing the medical sector by providing personalized and targeted treatments and by facilitating seamless communication of medical data. IoMT devices are more trustworthy in monitoring and tracking due to higher accuracy levels, which also minimize human errors and inaccurate reporting. While the merits of IoMT devices are clear, they also pose severe privacy and security risks. Medical systems acquire, process, and perform decision-making based on this sensitive health information. Cyber attackers who exploit the flaws and weaknesses in these IoMT devices might well be able to penetrate the hospital network and gain unauthorized access to private patient data. Attacks on these IoMT devices also have the potential to endanger the patients' lives and cause serious physical harm. In addition to outlining viable solutions that take into account constrained resources at IoMT end-devices, hybrid network architecture, application characteristics, and communication protocols, the book covers the core concepts of IoMT security and privacy. It describes both theoretical and practical aspects for those working in security in the IoMT, emphasizing the most significant potential IoT security issues and challenges.