Digital rights management method and digital rights management-enabled portable device

摘要

A DRM method and DRM-enabted portable device for controlling playback of DRM content on the basis of content usage log is disclosed. A digital rights management method for a portable device of the present invention includes playing a content item. recording, when an abnormal playback stop event is detected, a stop time point in a playback session of the content item on a usage log and controlling a next playback of the content item with reference to the recorded stop time point. The DRM method and DRM-enabled portable device of the present invention further manages the licenses issued for the DRM content stored in the portable device by updating the licenses even when the DRM content are abnormally closed during its playback session.