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US08370954B2 Content management systems and methods including content usage restrictions 失效
内容管理系统和方法包括内容使用限制

Content management systems and methods including content usage restrictions
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.
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