Research Of Information Security Technology In Electric Power Information System

Along with the widely using of the electric power information system in both LAN and WAN, the labefaction of network's security status threatens the security of computer. In allusion to the security problems that electric power information system faces, how to enhance the security and capability to protect the system against attacks becomes a new research hotspot and new requirement.In this thesis, we set our target on solving the security problems in electric power information system, and choose a typical distributed power supervisory control system for our analysis and design. Form analyzing the cause and characteristics of security problems in the current power distributed supervisory control system, according to avoid the access of illegal user, the illegal access of legal user and the dangers in data transfer, we study the identity authentication, access control, data integrity and also data confidentiality from the viewpoint of application.Based on discussing the modal of the typical power distributed supervisorycontrol system, we study the security of information access, data transfer and mobilecommunication services separately. In the chapter about the security of informationaccess, based on analyzing the familiar technology of identity authentication, accesscontrol and security audit, we carry out a System Security Service which can solve theaccess problems in distributed power supervisory control system based on password,RBAC and security audit of log file. In the chapter about the security of data transfer,based on the platform of CORBA middle ware and Web Service, we put forward apractical modal which is suit for solving the data transfer problems both in LAN andWAN using the technology of data integrity, data confidentiality and digital signature.In the chapter about the security of mobile communication services, based onconsidering the characteristics of GSM technology in power distributed supervisorycontrol system, we put forward a scheme to secure the data integrity and dataconfidentiality in mobile communication based on identity authentication, accesscontrol and information encryption.Besides changing the work pattern of the power factories, the using of electric power information system also saves the resources of manpower and material resources, and it really raises the level of automata and work efficiency in the power system. The main part of our scheme which referred in this thesis has been designed and programmed in YSS2000 Distributed Supervisor Control and Configuration.>y>>icji). This system is now running satisfactorily in many power factories and transformer substations.