Analysis of Satellite Systems' Dependencies and Their Cascading Impacts

Space infrastructure systems play a crucial role in modern society, underpinning various critical functions. This study investigates the complex network of interdependencies within the space infrastructure sector, specifically in satellite systems, and their potential cascading impacts in the face of cyberattacks. Utilizing expert elicitation, the research aims to define and quantify these interdependencies, providing insights into their characteristics and implications. This study involves the application of Functional Dependency Network Analysis, employing a graph-based mathematical approach to analyze the propagation of impact resulting from diverse cyberattack disruption scenarios. Simulated cyber scenarios focus on targeting space infrastructure, offering a detailed examination of the cascading effects within this vital sector. The results of the study include the identification of critical functionalities and improving the cybersecurity of satellite systems. The implications of the results would be beneficial for the threat modeling and design phase of satellite systems to result in higher cyber resiliency.