Contents player and playing method, mobile code providing device and providing method applied to DRM system

A method for playing contents, applied to a digital rights management (DRM) system, the method comprising:

• receiving contents encrypted by a DRM technology from a contents providing server and additional data regarding the contents;
• demodulating the contents by a DRM module;
• if the DRM module is not capable of demodulating the contents in the demodulating operation, updating the DRM module and demodulating the contents by the DRM module which is updated;
• and
• playing the contents which have been demodulated.

A mobile code providing device comprising:

• a network interface part which receives a mobile code requesting signal from a contents player;
• a mobile code request processing part which extracts a mobile code of a digital rights management (DRM) module and a meta data interpretation module from a database based on the requesting signal which was received;
• and
• a mobile code transmission part which transmits the mobile code of the DRM module which is extracted and the meta data interpretation module to the contents player.