MANAGEMENT DEVICE FOR RIGHTS MANAGEMENT OF TIME BASED DIGITAL RIGHTS MANAGEMENT AND METHOD THEREOF

摘要

A DRM method and apparatus of a mobile terminal is provided for protecting unauthorized use of a time-based DRM content and improving license validation reliability by providing a reliable reference time regardless of changes of local time and time zone. The digital rights management method of the present invention includes detecting a playback command for playing a right protected content, determining whether a previously stored reference parameter exists, which is generated using a reference time received from a server and a local time of the mobile terminal, and testing, when a previously stored reference parameter exists, validity of a license of the right protected content with reference to the reference parameter and the local time when the playback command is detected.