In the present invention, a method for a user equipment transmitting/receiving a signal with a network in a wireless communication system is disclosed. More particularly, the method comprises the following steps: receiving security setting information from the network; transmitting or receiving data with the network based on the security setting information; receiving a disconnection message from the network; releasing connection from the network; and actuating a timer when an indicator for maintaining the security setting is received from the network, wherein the security setting information is maintained while the timer is actuated.