Patent ID: 8875310

Claim:
A digital media contents protecting system for protecting a first container including an information region including information about the contents and a payload region including a payload with the contents, said system comprising: a packager for analyzing a format of the contents in the container and encoding at least a portion of a data region located in a payload of the contents, and for generating encoded contents by inserting encoding information comprising at least one of an encoding key value and contents information into the information region to maintain the container; and a digital rights management (DRM) server receiving a request for a license and the encoding information from the external device, for confirming the encoding information and then generating a license which is used to decode the encoded contents, and for providing the generated license to the external device; and a content server, which is disposed in a backend of the packager, for receiving the encoded contents from the packager and then storing the encoded contents, and for providing the stored contents in response to an external request; wherein the packager includes: a format analyzing unit for classifying a format of the contents; a payload data extracting unit for extracting a portion to be encoded from among the data region located in the payload, depending on a kind of the format of the contents; a data encoding unit for encoding the portion extracted in the payload data extracting unit, by using a predetermined key; an encoding information generating and inserting unit for generating the encoding information by encoding information including key information used for encoding and contents identifier information, and for inserting the encoding information into a information region of the contents; and an encoding information managing unit for managing the key information used in the data encoding unit and the encoding information generating and inserting unit.