一种计算机病毒传播模型的分析与仿真  

Analysis and Simulation of a Computer Virus Model

作　　者：刘铭[1] 洪帆[1] 韩兰胜[1] 

机构地区：[1]华中科技大学计算机学院信息安全系,湖北武汉430074

出　　处：《计算机仿真》2010年第5期305-308,共4页Computer Simulation

基　　金：国家自然科学基金(No:60703048);湖北省自然科学基金(No:2007ABA313;No:2008CDB352)

摘　　要：计算机病毒已经对计算机网络构成了严重地威胁。但由于计算机病毒传播复制的方式多种多样,很难简单地用单一的模型刻画所有的病毒,而应该根据病毒不同特征提出模型从而加以研究。传统模型一般以主机节点为研究对象,粒度较大,不能反映更细致的传播过程和相关特点。为遏制病毒传播,提出了一种新的病毒传播模型,用来描述通过网络共享方式传播的病毒。模型与传统的模型相比,采用了细粒度的文件代替主机作为研究对象,同时加入了文件类型比例及访问频度等参数。通过对模型方程的求解和分析,以及进行仿真实验,并将搜集整理的实际统计数据与实验数据比较,说明了模型能更为细致地反映病毒的传播特征,从而为计算机病毒的防范提供了科学依据。Viruses remain a significant threat to computer networks. The rate at which a virus can spread has risen dramatically with the increase in connectivity. Thorough researches of computer virus propagation are very important and urgently needed. But the spreading methods of computer viruses are different. One simple model is hard to describe all the types. On the contrary, different models should be proposed according to the features of different types of viruses. This article proposed a computer virus propagation model to describe those viruses spreading in the network through the method of file - sharing. This model takes the files in the sharing network as the subjects instead of the computers, which are always used in the traditional models, and analyses the influence of the ratio of specific type files in the network and the function of file accessing frequency. So the characters of virus can be analyzed more specifically. And the simulation data of this model accords with the actual statistical data very well.

关 键 词：计算机病毒 文件共享 信息安全 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]