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

摘要

In view of the fact that the apparatuses connected to a home network are located in the home, that is, near to each other, and that users can physically access their mutual apparatuses in a relatively short period of time, whether or not a home server that delivers contents and a client terminal that uses the contents are connected to the same home network can be determined by checking if the home server and the client terminal can share access to the same physical medium within a short period of time. The authenticity of apparatuses connected to the home network connected to an external network via a router can be certified.