Static data desensitization management (SDM) is the fourth function module. SDM supports static data desensitization involving databases, formatted files, database objects, message queues, etc. SDM has built-in 88 desensitization algorithms and 45 sensitive information type making up a matching library. The library Covers personal identity information, organization information, qualification certificate information, financial data information, medical data information, vehicle data information and many other categories of sensitive data type. SDM also supports simulation desensitization. It has generalized general-purpose desensitization rules, including character substitution, random generation, truncation, weighted generation, encryption, etc. It supports simulated desensitization rules that retain the meaning of the original data, supports Chinese dictionary database and coded dictionary database, and ensures the validity and availability of the desensitized data such as name, ID number, certificate number, address, organization code, etc. SDM provides internal desensitization based on database and extraction desensitization based on ETL process, which can meet various desensitization needs.