A random and scale-free hybrid P2P worm propagation model

In order to overcome the shortcomings of the existing models that use only the node degree distribution to construct the worm network, a worm propagation model with both random and preferential attachments is proposed, which considers both the property of scale-free network and the characteristics of real P2P network communication, and introduces a adjustment parameter representing the new node connection probability. Then, the evolution mechanism of the model is investigated based on the mean-field theory through Matlab simulation. Theoretical and simulated results show that the connection between the suitable nodes selected from the worm network and the newly-infected host is tightly related to the connection probability and the node attraction, and that the established worm network is scale-free.