中文摘要：

提出一种在P2P网络中传播的混合型蠕虫,即以概率γ体现P2P被动型蠕虫传播特点,以概率（1-γ）体现P2P沉默型蠕虫传播特点.分析该类P2P蠕虫传播过程中主机间的状态转换过程后,基于传染病模型对其传播过程进行了数学建模.该模型考虑了蠕虫执行环境差异,变化的P2P文件下载速率以及地址隐藏三个P2P蠕虫传播过程中的重要因素.仿真实验验证了传播模型的有效性,并且对于影响P2P混合型蠕虫的传播参数进行了讨论.

英文摘要：

A hybrid worm which propagates in peer-to-peer network is presented. It reflects the propagation features of P2P passive worms with probability γ and P2P reactive worms with probability 1 - γ. After analyzing the state transition of hosts in the process of P2P worm propagation, it is modeled based on the infectious model. And the model considers three important factors of different worm execution environment ,the changes of P2P file download rates and address hiding in P2P worm propagation. The simulation validates the propagation model, and the propagation parameters affecting the worm propagation is discussed.