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Attack and interception in networks

Francis Bloch, Kalyan Chatterjee () and Bhaskar Dutta ()
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Kalyan Chatterjee: Penn State University
Bhaskar Dutta: Department of Economics, University of Warwick and Ashoka University

Theoretical Economics, Forthcoming

Abstract: This paper studies a game of attack and interception in a network, where a single attacker chooses a target and a path, and each node chooses a level of protection. We show that the Nash equilibrium of the game exists and is unique. We characterize equilibrium attack paths and attack distributions as a function of the underlying network and target values. We show that adding a link or increasing the value of a target may harm the attacker - a comparative statics effect which is reminiscent of Braess's paradox in transportation economics. Finally, we contrast the Nash equilibrium with the equilibria of two variations of the model: one where all nodes cooperate in interception and one where nodes update their beliefs and make inspection decisions upon observing the arrival of a suspicious object.

Keywords: Keywords: Network interdiction; networks; attack and defense; inspection games (search for similar items in EconPapers)
JEL-codes: C72 D85 K42 (search for similar items in EconPapers)
Date: 2022-12-01
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Downloads: (external link) Working paper version. Paper will be copyedited and typeset before publication. (application/pdf)

Related works:
Working Paper: Attack and Interception in Networks (2021) Downloads
Working Paper: Attack and Interception in Networks (2021) Downloads
Working Paper: Attack and Interception in Networks (2021) Downloads
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