System for user-centric identity management and method thereof

PURPOSE: An identity management system of a user for controlling the circulation stream of personal information is provided to conveniently manage personal information by controlling the circulation stream of the personal information. CONSTITUTION: A browser receives a service parameter corresponding to a service from a service provider server. An interactive unit(40) receives the service parameter through a browser. The interactive unit selects one of a plurality of protocol parameters. A service processing unit performs a service protocol with the service provider server. The service processing unit transmits token information to the browser for the service.