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Sampling-Based Attack for Centrality Disruption in Comple...
Fariba Afrin Irany, Soumya Sarakar, Animesh Mukherjee, Sanjukta · 2024-07-09 · via cs.SI updates on arXiv.org

Many mobile networks are represented as graphs to obtain insight to their connectivity and transmission properties. Among these properties centrality resilience, that is, how well centralities, such as closeness and betweennesss, are maintained under attacks is a critical factor for proper functioning of a network. In this paper, we study the centrality resilience of complex networks by developing attack models to disrupt the rank of the top path-based centrality vertices. To develop our attack models, we extend the concept of rich clubs of influential vertices to the more general framework of scattered rich clubs. We define scattered rich clubs as dense subgraphs of high centrality vertices that are spread (scattered) across the network. Finding scattered rich clubs, although of polynomial time complexity, is extremely expensive computationally. We use snowball sampling to identify these important substructures as well as to identify which edges to target in our proposed attack models. Our results over a set of real world networks demonstrate that our proposed algorithm is effective in finding the single or scattered rich clubs efficiently and in successfully disrupting the centrality rankings of the network. To summarize, we propose sampling-based attack models for testing the resilience of networks with respect to centrality rankings. As part of this process, we introduce scattered rich clubs, a generalized form of the rich club model, efficient algorithms to detect them, and demonstrate their relation to network resilience.