Patent ID: 7836307

Claim:
A relay adapter comprising components, wherein the components of the relay adapter comprise: an authentication information storage section that stores encrypted authentication information of the relay adapter; a power plug at a front surface of the relay adapter; a power socket and at a back surface of the relay adapter, and a push switch disposed within a concave portion of either the power plug or the power socket of the relay adapter and configured to be depressed by a convex portion of an update adapter within the concave portion while the relay adapter is either plugged into the update adapter or the update adapter is plugged into the relay adapter, wherein the components of the relay adapter are configured to perform a method for processing communication data, said method comprising: detecting that the power plug of the relay adapter is plugged into a power socket of a user, wherein the power socket of the user is connected to a control server by a power line carrying a power signal, wherein said detecting comprises detecting a power voltage supplied to the relay adapter by the power signal; ascertaining that the push switch is not depressed; responsive to said ascertaining that the push switch is not depressed, enabling mutual authentication between the relay adapter and the control server; and after said performing authentication has been successfully completed, relaying the communication data from an information processing device of the user to a service provider server via the control server, wherein the service provider server is coupled to the control server by a communication network.