DRM is basically proprietary copy
protection.
The term ???DRM??? applies to a wide range of technologies that use server-based activation, encryption,
and other elements to control who can access content and what they can then do with the content
once it has been accessed. While it is very attractive to distributors of audio and video, who are
trying to prevent unchecked digital piracy of their content, it can be a real stumbling block for the
consumer.
Many DRM solutions require proprietary software and even hardware to work with the protected
content. A prime example is the recent production of some DRM-protected audio CDs, particularly
in Europe. Some of these disks will not play in older standalone CD players, some will play only
on a computer that supports the DRM application on the CD itself, and (especially frustrating)
some will not play on a computer at all. In almost all cases, such DRM solutions do not support
Linux. Most support only Windows, and a few support Windows and Mac OS X.
Just to make things clear, while the codecs just discussed do not include built-in DRM features,
some codecs are specifically designed to integrate with DRM solutions. In other words, all of these
codecs can theoretically be used to play encoded content on a Linux system.
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