Invention Grant
US09137493B2 Method and device for excerpt licensing 有权
摘录许可的方法和设备

Method and device for excerpt licensing
Abstract:
There are times when a first user may wish to distribute an excerpt of a protected digital content to a second user, for example for criticism. The protected digital content is divided into a plurality of parts, each part being encrypted using a control word specific for the part, wherein each control word can be generated from a master control word for the protected digital content. A device belonging to the first user selects the parts of the excerpt; generates the control words for the selected parts from the master control word; generates a license for the selected parts, the license comprising the control words for the selected parts; and transmits the selected parts and the license to the receiver of the second user. Also provided is the device of the first user.
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