Date Added: May 2012
Attentions to security on P2P networks have recently been increased, especially with respect to worm epidemics. Most of countermeasures that are proposed to prevent worm propagation are ineffective in P2P overlay networks. In this paper, the authors use heterogeneity among peers to prevent worm propagation in Gnutella network. Their solution is based on the observation that in P2P networks, there are different types of peers which have different vulnerabilities due to their different platforms. Therefore, a worm, which normally uses a specific vulnerability for propagation, can only infect a specific type of peers in the network.