发明名称 CONTENT MANAGEMENT SYSTEM AND CONTROL METHOD THEREOF
摘要 Key data is generated that contains a decryption key that decrypts an encrypted content, and a policy that defines the usage restrictions on the content. Binder data is then generated, which contains the encrypted content, key data, and the control data, which describes the applied conditions of the key data.
申请公布号 US2008022373(A1) 申请公布日期 2008.01.24
申请号 US20070754399 申请日期 2007.05.29
申请人 CANON KABUSHIKI KAISHA 发明人 TAKAHASHI TAKESHI
分类号 G06F7/04;G06F21/62;G06Q30/06;G06Q50/00;H04L9/08 主分类号 G06F7/04
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