A multiplex electrical outlet receptacle comprises a housing containing four or more receptacle outlets. Three or more computing apparatuses cooperate to generate a secret value of a random number, perform secure function computation for secret values of arbitrary values by using a function including addition and multiplication to compute concealed function values, and compute a secret value. A first level of the vehicle body is determined relative to a reference point directly before a discharge operation. The sealant layer is formed from a material different than the material that forms the remaining portions of the first and second profile members such that the sealant layer melts and forms a bond with the web material upon the application of heat.