Abstract
Abstract To solve the unreasonable allocation problem of network security defense resource, this paper presents a framework for optimal defense resource allocation for minimizing the network risk. The vulnerability power function model of network nodes is built based on nonlinear theory between defense resource and network vulnerability. The network risk assessment model is described by vulnerability model combining with local and global information of node. Numerical studies demonstrate that the strategies are optimum in terms of protection and redundancy allocation of network nodes. Simulation results show that our algorithm achieves the optimum allocation strategies of defense resource. Furthermore, network risk can quickly converge to a lower value.
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