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• DRM Technologies

• Digital rights management (DRM) is a collection of techniques used by copyright holders to limit access to and use of digital content
• Apple’s FairPlay
• Microsoft’s Windows Media DRM
• Authentication is a very simple form of digital rights management that allows content to be accessed only by authorized individuals
• A digital watermark is a pattern of bits, inserted at various places in an image or a content stream, that can be used to track, identify, verify, and control content use