Abstract: Instant messaging network，which follows the power-law distributions，is a virtual form of network topology be built on the actual Internet.In view of the complex network characteristic，in carring on the analysis to the immediate correspondence network topology in the foundation，a new birth and death process of IM worm is proposed.This model analyzes the probability distribution of the worm virus community to evolve the worm virus’s dissemination rule in the immediate correspondence network.The model analysis indicates the birth-death model analysis result has the good uniformity with virus’s dissemination characteristic in the scale-free network.

摘要： 即时通信网络是在实际的Internet网络拓扑之上构建一层虚拟的网络拓扑，它遵循幂率分布。针对复杂网络的特点，在对即时通信网络拓扑结构进行分析的基础上，提出了一种即时通信蠕虫病毒的群体生灭模型。该模型以分析蠕虫病毒群体的概率分布来演化即时通信网络上蠕虫病毒的传播规律。模型分析表明即时通信蠕虫病毒的群体生灭模型分析结果与无标度网络上病毒的传播特性具有较好的一致性。