P2P文件共享网络中被动蠕虫传播建模与分析

为了抑制P2P被动型蠕虫在大规模P2P文件共享网中的传播和攻击，对P2P网络中文件共享的特点和被动型蠕虫传播的特点进行了深入的分析，并在此基础上提出了3个分别适用于蠕虫传播不同阶段的传播模型。为了证明模型的正确性，进行了大规模仿真实验。使用专门的数值分析工具求出相应模型的理论值。为了仿真大规模P2P文件共享网，专门基于P2P仿真平台开发出能真实模拟流行P2P文件共享网的软件并基于该软件进行了仿真。理论值与仿真值匹配的事实表明，该模型基本上反映了蠕虫的传播情况，可以用来预测蠕虫的传播趋势和行为。

Propagation Modeling and Analysis of Passive Worms in Peer-to-Peer File-Sharing Networks

To counter the attack and propagation of passive worms in large-scale peer-to-peer(P2P) file-sharing networks, three propagating models of passive worms suitable for different stages of worm propagation, are proposed based on deep analysis on the features of file sharing and passive worm propagation. In order to verify the validity of the three modes, large scale simulating experiments are carried out. To simulate the true popular P2P file-sharing networks, a simulating software is developed based on the P2P simulating platform PeerSim. Theory analysis and simulation show that these models are valid and can predict the tendency and behaviors of worm propagation.