Abstract: E-mail worms may cause the spread of Internet spam and threaten the security of Internet. This paper presents a propagation model of E-mail worms in scale-free networks. The model explains the behaviors of E-mail users by the frequency of their checking E-mails and the probability of their opening E-mail attachments. It also simulates the propagation of worms in scale-free networks and random networks respectively. The simulation results show that worms spread more quickly in a scale-free network than in a random network, which is important to study the defense strategies against E-mail worms.

Key words: scale-free networks, E-mail worms, power-law topology, propagation model

摘要： 电子邮件蠕虫是引起因特网中垃圾邮件泛滥的原因之一，严重威胁着因特网。该文提出了一种无标度网络上电子邮件蠕虫的传播模型，它通过用户检查邮件的频率和打开邮件附件的概率来描述邮件用户的行为，仿真了蠕虫在无标度网络和随机网络中的传播。结果表明，蠕虫在无标度网络中的传播速度比在随机网络中快得多，对进一步研究蠕虫的防御具有重要的意义。

关键词: 无标度网络, 电子邮件蠕虫, 幂律拓扑, 传播模型

CLC Number: 

• TP309.5