关键词: 良性蠕虫, 离散时间模型, 混合型蠕虫建模, 网络安全

Abstract: In order to better characterize the propagation of benign worm, this paper adopted a discrete-time model. Under discrete time, the paper analyzed the propagation of hybrid-benign worms and presented a mathematical modeling, which took account of the network influence due to the spread of malicious worms and benign worms. Finally, the simulation validated the propagation model, and the key parameters were compared and analyzed with Taylor Equation. The theoretical analysis and experimental results indicate that there exists a critical value of switch time under a defined release time of hybrid-benign worms and the certain performance of network. And when the sensitivity of the network is small enough, different switch time would have no influence on the movement of the number of the infected hosts.

Key words: benign worm, discrete time model, hybrid worm modeling, network security