Abstract:Data masking is the most effective method to ensure the safe use of data in the process of data transfer. By hide identify the sensitive information in the data, it ensures the security and reliability of the privacy information in the process of use. This paper first introduces the data masking technology, including masking concept, masking principle and masking method, and then analyzes the data characteristics of the power enterprise, combs and forms the user privacy information category, and further extracts and divides the actual application scene of the user privacy information in the power system. On this basis, by using the irreversible data masking method, the data masking rules are formed, and the dynamic / static large data masking scheme is proposed according to the different business environment. This scheme closely combines the actual business needs of the electric power enterprises. During the application process, whether the existing system is reformed or the new equipment is deployed, the reasonable ratio between the input cost and the actual output is guaranteed to the maximum extent, so that the data value is fully excavated and the security of the user''s privacy information is ensured.