Method and apparatus for communication based on certification using static and dynamic identifier

PURPOSE: A method and an apparatus for communicating based on a certification with a static identifier and a dynamic identifier are provided to improve the accuracy of the certification by allowing the access of effective identifiers. CONSTITUTION: A client(10) provides a static identifier and a first dynamic identifier to a second server(14). The second server compares the static identifier and the first dynamic identifier to corresponding static identifier and dynamic identifier. The second server renews the first dynamic identifier and generates a second dynamic identifier(130). The second server transmits the second dynamic identifier to the client(140). The client access to a first server(12) based on the second identifier(150).