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 analyse their Non-Functional Properties, such as security. In this paper we identify, describe, analyse and categorise some challenges to security engineering of SoS. This catalogue of challenges offers a roadmap 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