Mission assurance for critical cloud applications is of growing importance to governments and military organizations; yet mission-critical cloud computing may face the challenge of using hybrid (public, private, and/or heterogeneous) clouds and achieving “end-to-end” and “cross-layered” security, dependability, and timeliness. In this book, we consider cloud applications in which assigned tasks or duties are performed in accordance with an intended purpose or plan in order to accomplish an assured mission.