Method and device for consuming rights objects having inheritance structure

摘要

A digital rights management method and device are provided. To implement the DRM method and device, there is provided a master device including a storage module, detection module, message generation module, device interface module and playback module. The storage module stores a plurality of rights objects (ROs) having an inheritance structure. The detection module searches the storage module for an RO corresponding to a predetermined content object. The message generation module generates an RO request message if the detection module fails to discover the RO corresponding to a predetermined content object from the storage module. The device interface module transmits the RO request message to a slave device and receives the RO corresponding to a predetermined content object from the slave device. The playback module plays back the predetermined content object using the RO corresponding to a predetermined content object from at least one of the storage module and the slave device.