Content delivery system and content delivery method
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United States of America Patent
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Sep 17, 2013
Grant Date -
Jul 25, 2002
app pub date -
Oct 31, 2001
filing date -
Nov 1, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
In a content delivery system, delivery of content and charging the fee of the content are performed and managed in a highly secure and effective fashion. If a content-purchasing request is transmitted from a user device to a shop server, a charging process is performed. A user device authentication server, which manages content delivery, converts an encrypted content key KpDAS(Kc) encrypted using a public key of the user device authentication server (DAS) into an encrypted content key KpDEV(Kc) encrypted using a public key KpDEV of the user device. If the charging process is successfully completed, the shop server transmits, to the user device, the encrypted content key KpDEV(Kc).
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