The operation of cyber infrastructures relies on both cyber and physical components, which are subject to incidental and intentional degradations of different kinds. The result potentially provides insights on system design and resource allocation of infrastructure reinforcement. The sensitivity of defense and attack at Nash equilibrium with respect to target valuation, and unit cost is also presented. Results show that in star structure, the attacker’s and defender’s Nash equilibrium pure strategies are sensitive to different interdependencies whereas in the bus structure, interdependency shows little impact on both defender’s and attacker’s more » pure NE strategies. Interdependency effects based on three basic topological structures: bus, star, and ring are considered and compared in game theoreticdefense strategy. This paper studies how interdependency in infrastructures affects defense effort deployment to counter external attacks by modeling a simultaneous game between a service provider (i.e., defender) and an attacker. = ,įunctionality of infrastructures not only depends on constituent components’ robustness but also the interdependency between components and systems.

Sequential gaming