This book presents quantitative models and analysis techniques to overcome various challenges in cyber attack prevention and detection for security and QoS, including: the latest research in computer and network behavior under attack and the conditions of normal use; new design principles and algorithms, which can be used by the engineers and practitioners to build secure computer systems and networks, improve security practices and move to guarantee QoS in the Internet; mathematical and statistical methods to achieve the accuracy and timeliness of detection of cyber attacks with low computational overhead; guidelines for the management of revenue control, scheduling, reservation and employment services and computer network services to ensure stability and delay end-to-end of the jobs even in a Denial of Service attacks or sudden demands. Secure Computer and Network Systems: Modeling, Analysis and Design is an up-to-date resource for practicing engineers and researchers involved in the security, reliability and quality of management and computer system network.