Attack, Defence, and Contagion in Networks

摘要

Connections between individuals facilitate the exchange of goods, resources, and information and create benefits these connections may be exploited by adversaries to spread then- attacks as well What is the optimal way to 4esign and defend networks in the face of attacks? We develop a model with a Designer and an Adversary The Designer jnoves first and chooses a network and an allocation of defence resources across-nodes,The Adversary then allocates attack resources on nodes, if an attack succeeds then the Adversary decides on how successful resources should navigate the network We obtain two principal results One, we show that in a wide variety of circumstances a star network with all defence resources allocated to the central node is optimal for the Designer Two, we identify conditions on the technology of conflict, network value function, and the resource configuration for which networks with multiple hubs/components are optimal.