The purpose of unified identity authentication service platform (ZFIAM) is to establish a unified user management, identity assignment and identity authentication system, realize single sign-on for all applications, realize dynamic synchronization of user identity and authority, strengthen information security early warning and audit, and improve system availability, security and user convenience. The unified authentication platform takes the identity warehouse as the identity data center, and realizes diversified authentication services, complex authorization management and institutional information management in collaboration. At the same time, it supports a variety of data sources, such as directory services, relational databases, and third-party identity data collection interfaces. Platform service supply and public business system group and exclusive business system group, as well as a set of technical system to support multi-system applications.