DYPOSIT investigates the problem of large, shared cyber physical systems under attack. The project considers the challenge of dynamically formulating and adapting security controls, rapidly and on-demand, in the face of unfolding attacks on a shared cyber physical system fabric integrating multiple applications run by a variety of stakeholders. This Chist-ERA project is being undertaken in collaboration with Bristol University, Lancaster University, Katholieke Universiteit Leuven, University College Cork and IMT Atlantique.