基于SEM的网络蠕虫传播模型研究

Research on SEM-based Internet Worm Propagation Models

长期以来,网络蠕虫一直是Internet安全的一个重要威胁。蠕虫传播模型是研究蠕虫传播特性最常用的一种方法,由于蠕虫在网络中的传播与流行疾病在人群中的传播有许多相似之处,因此当前大多数蠕虫传播模型都是基于简单传染病模型(Simple Epidemic Model,简称SEM)理论建立的。从简单传染病模型入手,依次分析了基于简单传染病模型的Kermack-Mackendrick模型、双因素模型和带宽限制蠕虫传播模型,指出了这些模型的提出背景及其特征因素,并总结了模型之间的相互关系,为后续蠕虫传播模型的建立提供了借鉴指导。

Internet worms have been,and continue to be,one of the most important threats to the Internet community.Accurately modeling the worm propagation is a most commonly used method to investigate its inherent characteristics.Most of the existing worm propagation models are based on the Simple Epidemic Model（SEM） due to the similarity of propagation characteristics between the Internet worm on Internet and the epidemic in crowd.In this paper,we first review the Simple Epidemic Model,and then analyze the Kermack-Mackendrick model,the two-factor model and the bandwidth-limited worm propagation model respectively,which are all proposed based on the SEM,and highlight the background and the distinguished properties of each models.Finally,the relationship between these models are conclude,which provides a guideline for construction of upcoming worm propagation models.