摘要
Modern industrial communication networks are increasingly based on open protocols and platforms that are also used in the office IT and Internet environment This reuse facilitates development and de-
Worm： A worm is malicious code whose propagation mechanisms rely on automatic exploration and exploitation of vulnerabilities in the targeted system, without involvement of any user. Worm infections are untargeted and usually create availability problems for the affected systems or even the Internet as a whole. In addition, the worm may carry malicious code to launch a distributed, targeted attack from all the infected hosts.
