Patent ID: 7574602

Claim:
An information-processing device comprising: a first interface configured to transmit content to at least one of a plurality of communication units belonging to a first group through a network; a second interface configured to receive unique identifications assigned to a plurality of communication units belonging to a second group; a first storage area configured to store a first unique identification received through the second interface, the first unique identification being assigned to a first communication unit belonging to the second group; a first judgment unit configured to determine whether a unique identification received through the first interface is stored with a same value as the first unique identification in the first storage area, the unique identification being registered to the first communication unit belonging to the first group; a content supply unit configured to transmit the content to the first communication unit belonging to the first group via the first interface when the first judgment unit determines that the unique identification is stored with the same value as the first unique identification in the first storage area; a second storage area configured to store a second unique identification received from a second communication unit belonging to the second group through the second interface while the content supply unit transmits the content to the first communication unit belonging to the first group through the first interface; and a management unit configured to delete all stored unique identifications from the first storage area and shift the second unique identification from the second storage area to the first storage area when the content supply unit has transmitted the content to the first communication unit belonging to the first group completely.