Game-Theoretic Approach to Resilience of Cyber-Physical Network Infrastructures and Preventive Strategies for Providers in the face of EMP threats
Shah, Urvashi Lalit
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Network security problems are challenging because of their complexity and interconnected structure. Attacks may occur on either cyber or physical components and may occur at different times, through different mediums and with different frequencies. The functionality of the system as a whole is critically dependent on the cyber as well as physical components, whose capacity is in fact dependent on each other. In this paper we present a game-theoretic approach for defenders to protect their infrastructure in a way that minimizes the diminution in capacity during an attack. We calculate the disutility function for defender and attacker using both sum and product forms. We then compute the Nash Equilibrium for our model and conduct analytical studies on a sample network topology. An interesting case of modern-day threat is the Electromagnetic pulse (EMP). The adverse effects of EMP has been demonstrated by solar storms, lightning strikes and atmospheric nuclear explosions before the ban on such tests. There has been an effort to reproduce the electromagnetic pulse of a nuclear device and study how the phenomenon impacts various kinds of electrical and electronic devices such as power grids, telecommunications and computer systems, both civilian and military. Technology to use the concept of EMP to disable electronics has been known for a long time. We study and give a short review on some historical observations and evaluate dangers countries may face from an EMP attack. Lastly, we evaluate the reality of the threat, response from government and private sectors and conclude with insights on current prevention efforts, and suggested strategies.