Need for a Realistic Measure of Attack Severity in Centrality Based Node Attack Strategies

Complex networks are robust to random failures; but not always to targeted attacks. The resilience of complex networks towards different node targeted attacks are studied immensely in the literature. Many node attack strategies were also proposed, and their efficiency was compared. However, in each of these proposals, the scientists used different measures of efficiency. So, it doesn't seem easy to compare them and choose the one most suitable for the system under examination. Here, we review the main results from the literature on centrality based node attack strategies. Our focus is only on the works on undirected and unweighted networks. We want to highlight the necessity of a more realistic measure of attack efficiency.