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Digital Rights Management (DRM) is the technology for securing content and managing the rights for its access. This technology is still being developed and researched; however, the first step toward preventing piracy of digital media content is being taken with the introduction of Windows Media Rights Manager. Windows Media Rights Manager will help you protect and secure your audio and video content through encrypting source .asf , .mp3, and .wav files into packaged .asf files and by providing licenses to your users. By implementing this feature, you will be able to know who has copies of your content and place a digital signature on each piece of content you distribute.
Using Windows Media Rights Manager will have an impact on your entire streaming system. This overview touches on some of the areas of interest for content creators, web-publishers, and end-users. For more detailed information see the Windows Media Technologies page at the Microsoft Web Site or the Windows Media Rights Manager documentation.