This book describes new methods and measures which enable ICT service providers and large IT departments to provide secure ICT services in an industrialized IT production environment characterized by rigorous specialization, standardization and division of labor along the complete supply chain. This book is also for suppliers playing their role in this industry. Even more important, user organizations are given deep insight in secure IT production which allows them to make the best out of cloud, mobile and beyond. This book presents a new organization and classification scheme being thoroughly modular and hierarchical. It contains a security taxonomy that organizes all aspects of modern industrialized IT production. The approach takes operational requirements into account and focuses on user requirements, thus facing the reality in the market economy. Despite cost pressure, providers must ensure security by exploiting economies of scale to raise the efficiency also with respect to security. Furthermore, this book describes a wealth of security measures derived from real-world challenges in IT production and IT service management.