Abstract: A method and system for authenticating a home device in a home network, includes generating a home key for authentication of the home device, receiving a secret key corresponding to the home device from the home device, encrypting the home key with the received secret key, and transmitting the encrypted home key to the home device. The home device decodes the encrypted home key using the secret key and then stores the home key. Accordingly, the authentication of the home device is performed without requiring a home server, which would cause an overhead, and the processing of a guest device and a revoked device are performed.

Abstract: An external authentication method authenticates access a home network from outside the home network using temporal credential information. The method of authentication for the home network includes requesting a transmission of temporal credential information from the home server for authenticating a user, and receiving the temporal credential information from the home server. The temporal credential information is information including, for example, a temporal authentication key. Accordingly, the home user can access the home network by performing a facilitated and safer authentication using the temporal authentication key from outside the home network.