Patent ID: 8904546
Filing Date: 2014-12-02
Classification: G06F,H04L,H04N

Abstract:
1. A digital rights management (DRM) method for a portable device, comprising: creating, when a DRM content starts, a usage log of the DRM content including elapsed playback time; determining, when a playback stop event is detected, whether the playback stop event occurs before completion of the playback of the DRM content; and recording, when the playback stop event occurs before completion of the playback of the DRM content, the usage log of the DRM content, so that a license issued for the DRM content is updated according to the usage log of the DRM content; notifying, when the playback stop event occurs before completion of the playback of the DRM content, an updating of the license of the DRM content by displaying a pop-up screen, wherein the usage log is encrypted for maintaining data integrity.