Abstract: Robustness and smallworld property of scalefree network are the desirable features in worm network. Taking advantage of worm propagation properties, this paper proposed three worm propagation models which are employed to build scalefree worm network. In these models, a compromised host is connected to the worm network by linking with suitable worm nodes. The nodes are chosen according to the node properties, such as the degree and fitness of the node. Theoretical analysis and simulation were conducted and the results demonstrate that the worm networks generated by the proposed models are scalefree.

Key words: computer systems organization, worm, scalefree network, propagation model, network security