PlayReady


PlayReady is a media file copy prevention technology from Microsoft that includes encryption, output prevention and digital rights management. It was announced in February 2007.
The main differences relative to previous DRM schemes from Microsoft are:
PlayReady competes with other proprietary DRM schemes and even more with DRM-free software, most notably Apple's FairPlay introduced in iTunes and QuickTime. There are several other DRM schemes that are competing to become the dominant DRM technology.
Microsoft released the first version of the PlayReady suite in June 2008. Silverlight 2.0, released in October 2008, supports content restricted with PlayReady. As of Silverlight 4.0, the implementation of Microsoft PlayReady in Silverlight supports offline content, subscription scenarios and online, streaming-only content. Output protection support was also added in Silverlight 4.0.

Interoperability