Communication control device, communication device, and computer program product for dynamic group management

A communication control device includes an extracting unit and an output unit. The extracting unit extracts, from a media key block containing a plurality of elements, partial information that contains elements which can be processed by a communication device having a device ID thereof identified in identification information for identifying one or more device IDs. The output unit outputs a group ID for identifying a group, the identification information, and the partial information, to a plurality of the communication devices that include all of the communication devices belonging to the group.