基于开放环境的P2P网络主动型蠕虫传播模型

Active Worms Propagation Model Based on the pen Environment P2P Netword

P2P网络主动型蠕虫采用主动扫描邻居节点信息的策略,能在短时间内破坏整个P2P网络,成为网络信息系统最为严重的安全威胁。结合主动型蠕虫的传播特点,考虑开放的P2P网络环境对蠕虫传播的影响,弥补现有模型忽略P2P网络动态性的不足,建立了基于开放环境的P2P网络蠕虫传播模型。与双因素模型相比较,该模型能更客观地反映现实网络中蠕虫的传播情况,在此基础上从初始已感染主机数、感染率、免疫率3方面定量分析了蠕虫的传播规律。仿真结果表明,感染率和免疫率是影响蠕虫传播的关键因素。

P2P network active worm spread rapidly throughout the network utilizing the strategy of actively scanning neighbor node information, can destroy the whole network in a short period time, it has become the most serious security threat in P2P application. In this paper, a propagation model is proposed based on the open environment P2P network which takes both active worm propagation characteristics and the influence of open network environment into consideration. Compared with the propagation model of two.factor, the new model is more suitable for the propagation characteristics of active worm in P2P network. On this basis, three important factors influencing the propagation of worm are researched quantitatively, includes the number of initial infection host, infection rate and immunization rate. The simulation results show that the infection rate and immunization rate are important factors to influence orm propagation procedure.