Discussions on Information Security Test Strategy for Digital Industrial Control System in Nuclear Power Plant

The control system decides the safety and economy as a neural center, the information security plays a critical role in control system. With the fusion of industrialize and information, and with the development of digital nuclear power plant, the increasing number of general software technologies including network communication, operational system, etc., have been used, the security problem from traditional IT system has been introduce into industrial control system. By the view of information security, this paper analyzes characteristics of industrial control system that used in nuclear power plant, and establishes a hierarchy model from company management to software entity, then provides the defensive method for probably and potential intrusion on each level. Finally, this paper summarizes defense in depth system from software design and development to social engineering, and provides references for the optimization of information security in industrial control system.