Method and device for authenticating personal network entity

Abstract

A method of authenticating a Personal Network Entity (PNE) is provided. The method includes transmitting a PNE serial number (SN) to a CPNS (Converged Personal Network Service) server by a Personal Network GateWay (PN GW); storing an authentication value chain of a PNE transmitted from the CPNS server and an inherent assignment key (TK) that is secret information of a corresponding PNE; encrypting a selected authentication value from among the authentication value chain with the inherent assignment key of the corresponding PNE to transmit the encrypted authentication value to the corresponding PNE and storing the encrypted authentication value in the corresponding PNE; and performing an authentication procedure between the corresponding PNE and the CPNS server by using the encrypted authentication value stored in the PNE.