Аналіз стійкості рівноваги неша в біматричній моделі управління інформаційною безпекою

Abstract

This work examines how changes in attack probabilities influence the equilibrium structure in a cybersecurity strategy selection model. The interaction between a defender (CISO) and an attacker is modeled as a bimatrix game with two defense strategies and two attack strategies. The payoff function is based on potential losses determined by the asset value, exposure factors, and the cost of security strategies. A threshold probability value is derived that indicates the point at which the optimal defense strategy changes. The results show how variations in attack probabilities affect the rational choice of defense strategies and support more flexible decision-making in information security management.