Ensuring secure transmission and good quality of service (QoS) in ad hoc wireless networks are key commercial concerns. Focusing on practical potential solutions, this text covers security and QoS in these networks. Starting with a review of the basic principles of ad hoc wireless networking, coverage progresses to vulnerabilities, and the requirements and solutions necessary to tackle them. QoS in relation to ad hoc networks is covered in detail, with specific attention to routing, QoS support in unicast communication, and recent developments in the area. Secure routing, intrusion detection, security in WiMax networks and trust management are also covered, the latter being based on principles and practice of key management and authentication in distributed networks. Representing the state-of-the-art in ad hoc wireless network security, this book is a valuable resource for researchers in electrical and computer engineering, as well as practitioners in the wireless communications industry.