INTER-DEVICE AUTHENTICATION SYSTEM, INTER-DEVICE AUTHENTICATION METHOD, COMMUNICATION DEVICE, AND COMPUTER PROGRAM

摘要

A function for isolating a home network from an external network is mounted on a router or a gateway arranged between the home network and the external network. For example, when a home server registers a client as a member or providing a content or issuing the license, the home network is isolated from the external network so that it is guaranteed that the request source client can exist in a local environment. It is possible to manage use of the content validly acquired on the home server, within a private use range admitted by the copyright law, by the client terminal.