Abstract: In view of the demand of copyright protection of digital media，a technology of diffusion control for general DRM system is proposed. It does not depend on the format and content of media files. Media files are encrypted and packed，which can be only opened by authorized users. Meanwhile，the process monitoring program stops illegal operations of diffusing media file content，and process hiding method prevents the monitoring program from being shut down by users. Diffusion control for general DRM system concerns combining of the protected media files and the protecting files，and it prevents digital media content from being illegally diffused.

Key words: general DRM system, digital media, file binding, process hiding