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CONTENTS DISTRIBUTION SYSTEM, CENTER SERVER, USER TERMINAL DEVICE, MOBILE AUTHENTICATION APPARATUS, COMPUTER PROGRAM, STORAGE MEDIUM, AND CONTENTS DISTRIBUTION METHOD FOR CENTER SERVER
CONTENTS DISTRIBUTION SYSTEM, CENTER SERVER, USER TERMINAL DEVICE, MOBILE AUTHENTICATION APPARATUS, COMPUTER PROGRAM, STORAGE MEDIUM, AND CONTENTS DISTRIBUTION METHOD FOR CENTER SERVER
PROBLEM TO BE SOLVED: To provide a contents distribution system by which key data decoding encryption contents data is distributed in real time and securely.;SOLUTION: The center server of the contents distribution system comprises: a cipher server generating contents key data inherent to each contents data to encrypt the contents data; a contents distribution server distributing the encryption contents data formed by encrypting the contents data to user terminal device requesting the desired contents data; an approval server conducting approval for distributing the encryption contents key data to a card; and a license authentication server authenticating the card by a first authentication means and distributing control information data containing the encryption contents key data in securely to the card.;COPYRIGHT: (C)2004,JPO
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