(With the development of computer technology, communication technology and control technology, industrial automation control has begun to develop in the direction of networking, from the beginning of CCS (computer centralized control system) to the second generation of DCS (distributed control system), the development Now the prevailing FCS (field bus control system). At this stage, a variety of popular technologies such as embedded technology, multi-standard industrial control network interconnection, and wireless technology are integrated, thereby broadening the development space in the field of industrial control and bringing new development opportunities. But at the same time, it also brought brand new challenges. In the fierce competition environment at that time, how to maintain their competitive advantages, especially how to safely and effectively use the core source code and technical documents of the control system to become an industrial control organization The main subject of concern, core information security and anti-leakage, has also become a major business requirement.)