Method and device for excerpt licensing

摘要

There are times when a first user may wish to distribute an excerpt of a protected digital content (120) to a second user, for example for criticism. The protected digital content (120) is divided into a plurality of parts (130), each part (130) being encrypted using a control word specific for the part (130), wherein each control word can be generated from a master control word for the protected digital content (120). A device (400) belonging to the first user selects (S31) the parts (130) of the excerpt; generates (S33) the control words for the selected parts (130) from the master control word; generates (S33) a license for the selected parts (130), the license comprising the control words for the selected parts; and transmits (S35) the selected parts (130) and the license to the receiver of the second user. Also provided is the device (400) of the first user.