Authentication Center, Authentication Method using smart card on mobile communications and method of supporting global roaming service

摘要

PURPOSE: A method for certification in a mobile communications net by using a smart card is provided to prevent that an unqualified user uses the service and to prevent network exposure of secret information of the user by using the smart card in the mobile communications circumstance. CONSTITUTION: A method for certification in a mobile communications net by using a smart card includes a few stages. In the first stage the certifying center of network generates a public key and a secret key and stores them in DB of the certifying center when execution begins. In the second stage(41) the mobile subscriber registers service with own ID in the certifying center. In the third stage(42,43,44) the mobile subscriber puts own smart card into the mobile terminal and judges yes or no of network excess. In the fourth stage(45) network certifies information sent through the mobile terminal and the smart card and inspects if the mobile subscriber and the smart card holder are reasonable or not when the mobile subscriber tries network excess by putting own smart card into the mobile terminal. In the fifth stage(46,47,48) the mobile subscriber gets mobile service according to the result of inspecting and ends the mobile communications service and removes the card from the mobile terminal and then the identity certification and inspecting service using the smart card end.