COMMUNICATIONS APPARATUS, SERVER APPARATUS, COMMUNICATIONS METHOD, AND COMMUNICATIONS PROGRAM

PROBLEM TO BE SOLVED: To provide a communications technique by which a combination of each encryption piece distributed in a content distribution system becomes unique every for a communications apparatus, and which is capable of improving degree of freedom when structuring the system. SOLUTION: A c...

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Hauptverfasser:	KAMIBAYASHI TATSU, KOIKE RYUICHI, MATSUMOTO HIDEKI, KATO HIROSHI, CHO MASAAKI, ITO SATOSHI, TOYAMA HARUHIKO, MATSUSHITA TATSUYUKI, UMEZAWA KENTARO, YAMANAKA SHINJI
Format:	Patent
Sprache:	eng
Schlagworte:	ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION WIRELESS COMMUNICATIONS NETWORKS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a communications technique by which a combination of each encryption piece distributed in a content distribution system becomes unique every for a communications apparatus, and which is capable of improving degree of freedom when structuring the system. SOLUTION: A communications apparatus has: a piece receiving section that receives a first encryption piece which is a piece encrypted by a first encryption key allocated to the other nodes 50 and 51, and first apparatus identification information for identifying the other nodes 50 and 51; a unique information storage that stores an allocated second encryption key; a piece encryption section that generates a second encryption piece obtained by further encrypting the first encryption piece using the second encryption key; and a data transmitter that transmits the second encryption piece, the first apparatus identification information, and second apparatus identification information for identifying the self apparatus. COPYRIGHT: (C)2010,JPO&INPIT