关键词: 蠕虫, 非均匀随机扫描, 离散传播模型, 主机分布密度, 网络攻击

Abstract: In order to improve the propagation efficiency of the worm, a worm discrete propagation model based on uneven random scan was established under the in-depth study of even-scanning strategy. For researching this model dynamically, three important factors influencing the propagation of worm were researched quantitatively, such as immunization rate of infected hosts, immunization rate of susceptible hosts and the number of hosts scanning. The infected hosts rate reaches 0.8 and above, ahead of 1000 seconds to reach the peak number, and delays 2000 seconds to be restrained half. Finally, the simulation results indicate that this model has high efficiency.

Key words: worm, uneven random scan, discrete propagation model, distributing density of hosts, network attack