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FIELD Computational Sciences
DATE July 30 (Fri), 2021
TIME 15:00-18:00
PLACE 7323
SPEAKER Kookyoung Han
HOST Lee, Deok-Sun
INSTITUTE UNIST
TITLE A reputation game on cyber-security and cyber-risk calibration
ABSTRACT

To analyze strategic interactions in the cyber-security environment, we develop a reputation game model in which an attacker can pretend to be a normal user and a defender may have to announce attack detection at a certain point of time without knowing whether he has been attacked. We show the existence and uniqueness of sequential equilibrium in Markov strategies, and explicitly characterize the players' equilibrium strategies. Using our model, we suggest empirical and theoretical ways of estimating the attack probability and calibrate the model parameters based on actual data.

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