Security is embedded in every task of the CRA and constitutes a cross-cutting research area. In addition, we offer a separate task dedicated entirely to CPS security to complement, coordinate, and bolster other security efforts within the CRA, and distill and solve cross-cutting security challenges for IoBTs. Security and trust, in general, are fundamental for battlefield IoTs. Unlike their civilian counterparts, IoBTs are subjected to a much broader spectrum of threats, and must therefore exhibit significantly better robustness, resilience, and security in the face of a large range of adversaries. This research area is dedicated to addressing the above challenges.