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Digital content license generation system , digital content license generation method and digital content license generation program .
Digital content license generation system , digital content license generation method and digital content license generation program .
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机译:数字内容许可证生成系统,数字内容许可证生成方法和数字内容许可证生成程序。
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摘要
PROBLEM TO BE SOLVED: To improve security in order to, even if a content key is leaked, prohibit a non-licensed user terminal from using digital content, without a significant increase in processing of encryption/decryption.;SOLUTION: A digital content generation apparatus 100d generates fragment content by dividing digital content encrypted with a content key into plural fragments, combining a portion of the fragments, and adding information for restoration to the digital content to the combined fragments, accumulates the fragment content in a license generation apparatus 100a, generates fragment-removed content by combining not-combined fragments of the digital content, and distributes the fragment-removed content to a user terminal 300 via a broadcasting facility 200.;COPYRIGHT: (C)2014,JPO&INPIT
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