Modeling Analysis of Network Worm Propagation

In this paper,some existing models about the propagation of worms are briefly introduced,and then a concrete analysis about the effect of Network Address Translator (NAT) on worm propagation is given.To overcome the weakness of traditional models in describing the propagation of worms,a two-phase worm propagation model based on analytical active worm propagation model is proposed.Comparison between the predicted result made by this model and the real propagation data of Red Code v2 measured by CAIDA in 2001 shows that the improved model gives a better description of worm's propagation.