The fourth edition of Wearable and Implantable Medical Devices: Applications and Challenges focuses on the latest developments in wearable and implanted sensor technology for monitoring systems and the healthcare industry. Numerous interdisciplinary fields are covered by the book’s contributions, including Internet-of-Things (IoT), wearable and implanted sensors, security, real-time medical healthcare monitoring, WIBSN design and data management, encryption, and decision-support systems. A number of subjects are highlighted in the contributions, such as wearable device design and implementation as well as real-world applications. This book shows that there is a bright future for this emerging field in healthcare monitoring systems and applied healthcare research. Features a multidisciplinary approach to various healthcare applications and their associated challenges based on wearable and implanted technologies. Contains extensive information on wearable and implanted device technology, wearable and implanted sensors design, WIBSN requirements, WIBSN in monitoring systems, and security concepts. Highlights machine learning and computing in healthcare monitoring systems based on WIBSN.