Hazuki International, LLC
Communication apparatus, communication method, communication system, and computer program
A measurement to obtain an RTT to a receiving apparatus is performed by a relay apparatus that is disposed between a WAN and a home network and connects these two networks. That an RTT value is equal to or less than the threshold value is set as a content distribution condition from a transmitting apparatus, so that the same use environment as a system using current DLNA and DTCP-IP can be realized for content use in the home network. Thereby, unjust distribution of content is prevented while an authentication and key exchange procedure performed via an external network is allowed.
SONY CORPORATION
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inventional inventional inventional inventional additional
Takehiko Hisato
Nakano Shima