Our new publication “Analyzing Implicit Interactions to Identify Weak Points in Cyber-Physical System Designs” is now published online. In this paper, we present an approach to identify weak points in the designs of cyber-physical systems based on frequency analyses of the interactions, both implicit and intended, present in a system design. We demonstrate the approach with a real-world Wastewater Dechlorination System. The proposed method can aid system designers in understanding which aspects of their systems contribute most to the existence of implicit interactions to enable effective mitigation strategies to improve overall system security and resilience. It was presented at the 2021 Resilience Week Symposium in October 2021. See Publications for more details!