Abstract
Because of the special position of electric power industry in national economy and social life, electric power information security has been given particular attention. For lack of the theory basis of the security area classification and the access strategy between security areas in power grid enterprise, a new classification and protection method based on network business security for power grid enterprise information system has been proposed. The Electric Power Access Control (EPAC) model, which can restrict and protect the access between business areas in different security levels, has been proposed as well. On the basis of the EPAC model and classification protection theory based on network business security, security defense model of power grid enterprise information system has been designed, providing a theoretical basis for the security construction of power grid enterprise information system.
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