Method and apparatus of access certificate in a wireless communication system

The present invention for a method and apparatus for performing access authentication of the mobile terminal in a wireless communication system, the method, comprising the steps of: receiving a session certificate for the access authenticated by the core network, handover to a new access network, in the event it comprises the step of receiving the authentication result to the process and, based on the session certificate from the new access network to transfer to a new access network, the certificate of the session.