then the first device 50 generates an ownership authentication key in a manner similar to the method of generating the ownership authentication key of the main rc 5 using the information on the sub rc 7 and other information to confirm the ownership of the sub rc 7 the ownership authentication key is compared with the ownership authentication key given by the sub rc 7 according to the result the service requested by the sub rc 7 is provided fig2 is a schematic diagram illustrating the configuration of a remote controller according to an exemplary embodiment of the present invention the rc 5 and 7 includes a memory 40 a user interface 15 a location limited channel llc interface 25 an authentication requester 30 a secret key generator 35 and a controller 10 as illustrated in fig2 the memory 40 of the rc 5 and 7 stores different information according to functioning as the main rc 5 or the sub rc 7 the memory 40 of the main rc 5 stores information on a home device that forms one domain managed by the owner or manager such as a model name of the first device 50 inside ip address and access key accessing the corresponding home device the memory 40 also stores an access control list acl which contains information on available users for each home device in the network who are set by the owner or manager the acl includes information on the sub rc 7 owned by each available user and a hash function encrypting a public key for the corresponding sub rc 7 the memory 40 of the sub rc 7 stores personal information on the corresponding user information on.