The Internet is large, but it is finite. We examine the case of several attackers seeking victims in a large population where there is some prior statistic indicating likely viablility. We show that collisions reduce attacker gains: the sum of what several attackers can extract is always less than what a single attacker would extract alone. The problem gets worse as the density of victims in the population decreases.

}, author = {Cormac Herley}, journal = {WEIS}, title = {Small World: Collisions among attackers in a finite population}, url = {http://research.microsoft.com/apps/pubs/default.aspx?id=192109}, year = {2013}, }