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邮件蠕虫传播与防御的分析研究


□ 罗卫敏 张凤荔

  (1.重庆三峡学院 数学与计算机科学学院, 重庆 万州 404000;2.电子科技大学 计算机科学与工程学院, 成都 610054)
  
  摘 要:邮件蠕虫利用e-mail在具有power-law结构特点的网络中进行传播,使得传统的蠕虫防御策略失效。结合power-law网络拓扑结构的特点,引入节点免疫和邮件服务器参与两种防御策略,分别对重复感染与非重复感染两种类型的邮件蠕虫传播进行了实验仿真。结果表明,节点的优先免疫类型、免疫起始时间、邮件服务器参与防御时间及蠕虫邮件识别正确率都与邮件蠕虫的传播有着紧密联系。
  
  关键词:网络安全;邮件蠕虫;幂律法则;免疫
  中图分类号:TP309.5文献标志码:A
  文章编号:1001-3695(2009)04-1532-03
  
  Analysis and research of propagation and defense of e-mail worm
  
  LUO Wei-min1,2,ZHANG Feng-li2
  (1.College of Mathematics & Computer Science, Chongqing Three Gorges University, Wanzhou Chongqing 404000, China;2.School of Computer Science & Engineering ,University of Electronic Science & Technology of China, Chengdu 610054, China)
  Abstract:E-mail worm spreads in the power-law network by sending e-mail.The policies which were used to defend traditio-nal worm were improper to defend e-mail worm. This paper presented the e-mail worm simulation based on power-law topology on two e-mail worm styles including repeated infection and unrepeated infection by considering two defense policies included node immunization and e-mail server’s filter function. The results show that many factors included the first immunized node style, the start-time of immunization, the start-time of e-mail server’s filter and the filter preciseness have great influence on e-mail worm propagation. ......
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