Optimizing topological cascade resilience based on the structure of terrorist networks

Details Optimizing topological cascade resilience based on the structure of terrorist networks Optimizing topological cascade resilience based on the structure of terrorist networks

2009-06-03

arxiv.org/abs/0906.0786v2

PLoS ONE 5(11): e13448 (2010)

Mathematics

Combinatorics

26 pages. v2: In review at Public Library of Science ONE

Scientific paper

10.1371/journal.pone.0013448

Complex socioeconomic networks such as information, finance and even terrorist networks need resilience to cascades - to prevent the failure of a single node from causing a far-reaching domino effect. We show that terrorist and guerrilla networks are uniquely cascade-resilient while maintaining high efficiency, but they become more vulnerable beyond a certain threshold. We also introduce an optimization method for constructing networks with high passive cascade resilience. The optimal networks are found to be based on cells, where each cell has a star topology. Counterintuitively, we find that there are conditions where networks should not be modified to stop cascades because doing so would come at a disproportionate loss of efficiency. Implementation of these findings can lead to more cascade-resilient networks in many diverse areas.

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