METHOD OF PROVIDING LICENSE RESPONSE TO ENCRYPTED CONTENTS TO CLIENT APPARATUS AND DIGITAL RIGHTS MANAGEMENT CONVERSION SYSTEM OF ENABLING THE METHOD

摘要

A method for providing a license corresponding to encoded contents to a client device and a DRM conversion system applying the same are provided to offer the third person the license received from a server corresponding to a DRM mode encoding the license if the DRM contents converted in the DRM system are super-distributed to the third person and a license request is received from the third person. A DRM converter(501) generates the second contents of the second DRM mode and the second license corresponding to the second contents by converting the first contents of the first DRM mode and the corresponding first license. A license request receiver(503) receives the license request for the second contents super-distributed to the third person. A license provider(505) requests the second license corresponding to the second license to the server corresponding to the second DRM mode and provides the second license received from the server to the third person. A conversion log database(502) stores a DRM conversion log. An approval inquirer(504) inquires an approval for the license request from the server corresponding to the first DRM mode.