Systems of systems (SoS) are large-scale systems composed of complex systems with difficult to predict emergent properties. One of the most significant challenges in the engineering of such systems is how to model and analyze their Non-Functional Properties (NFP), such as security. In this review paper we identify, describe, analyze and categorize challenges to security engineering for SoS. This catalog of challenges offers a road-map of major directions for future research activities, and a set of requirements against which present and future solutions of security for SoS can be evaluated.
systems-of-systems, security