Abstract

The Internet has a very complex connectivity recently modeled by the class of scale-free networks. This feature, which appears to be very efficient for a communications network, favors at the same time the spreading of computer viruses. We analyze real data from computer virus infections and find the average lifetime and persistence of viral strains on the Internet. We define a dynamical model for the spreading of infections on scale-free networks. finding the absence of an epidemic threshold and its associated critical behavior. This new epidemiological framework rationalizes data of computer viruses and could help in the understanding of other spreading phenomena on communication and social networks.

Notes

Originally published in Physical Review Letters, v.86 no.14 (2001), pp.3200-3203. DOI:10.1103/PhysRevLett.86.3200. Dr. Vespignani is affiliated with Northeastern University as of the time of deposit.

Keywords

scale-free networks, epidemics, dynamical models

Subject Categories

Internet, Computer viruses

Disciplines

Physics

Publisher

American Physical Society

Publication Date

4-2-2001

Rights Information

©2001 American Physical Society

Rights Holder

American Physical Society

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