DRM (Digital Rights Management)

Digital Rights Management, more commonly referred to simply as DRM, is a system that allows use of protected media to be restricted. DRM systems are most commonly found in music files and can be used to restrict the number of times a file is moved from one media player to another, or to restrict the number of times or period of time that a file can be played back. DRM is also commonly found on video media. A wide variety of different DRM systems exist today, including Apple's FairPlay and Microsoft's Windows Media DRM 10.