System, apparatus and method for SIM-based authentification and encryption in wireless local area network access

The invention relates to a system, device and method, and arranged into the WLAN user terminal and SIM-based authentication and a protecting the terminal device and mobile network layer encryption 2 mechanism is groove; it has no need to provide the IP connection. Therefore, the invention claims a method for; and access controller in aggregate of the AKA dialog between terminal is a PPP channel, wherein the access controller is provided with an access of the SIM mobile network. The invention further claims an access controller, comprising a Ethernet point to point (PPPoE); the is a installed in the terminal in aggregate of the other target excavation the AKA dialog formed PPP user, further - comprising service router and RADIUS is. Therefore, wherein the RADIUS is SOURCE is inserted to from the RADIUS agent for WLAN a connector socket (AP) access and executing the SIM authentication mobile networks-based.