A welding structure for a fuel tank including a resin inner shell and a resin outer shell interposed by a fuel permeation prevention layer such that they are laminated, and a resin component attached to the fuel tank. The first message includes a timestamp parameter corresponding to a generic bootstrapping architecture user security settings stored in the BSF. These steps are performed by discrete logic circuitry that provides an event notification to a microprocessor when the indication of the amount of difference exceeds the predetermined amount.