Method for creating smart contens and method for executing smart contens, and method for n-screen service of smart contens

PURPOSE: A smart contents generating method, a smart contents executing method, and n-screen service method of smart contents have a contents service provider or a contents provider put a contents copyright protection code in protected contents and distribute it, and have a user terminal provide N-screen service through a smart code executor device without an extra DRM agent. CONSTITUTION: A smart content generator (400) converts DRM (Digital Rights Management) agent code to fit a standard of smart contents (410), and generates a smart code (413). User terminals (620,630) play the smart contents through a smart code executor (500). The smart contents include contents protected with a digital copyright management technology (412), metadata including information necessary to user the contents (411), and position information for downloading the smart code for protecting the contents' copyright or the smart code. [Reference numerals] (400) Smart content generator; (410) Smart contents; (411) Meta data; (412) Protected contents; (413) Smart code; (500) Smart contents executor device; (510) Smart contents executor device; (520) Smart agent; (610) Service provider; (620) User terminal #1; (621) Contents player; (630) User terminal #2; (640) User terminal #3; (650) Smart code executor; (660) License server