COMMUNICATION CONTROL DEVICE, COMMUNICATION DEVICE, AND COMPUTER PROGRAM PRODUCT
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United States of America Patent
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Mar 30, 2015
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Nov 2, 2012
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Abstract
A communication control device includes an extracting and an output unit. One or more communication devices belong to a first-type group, and one or more communication devices belong to a second-type group. From a media key block containing a plurality of elements, the extracting unit extracts partial information containing an element which is processible by each communication device belonging to a subset of the second-type group. To the communication devices belonging to the second-type group that is identified by identification information corresponding to the partial information; the output unit outputs a group ID that indicates the first-type group, the identification information, and the partial information.
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