Problem
Consider a popular DRM system like Apple's FairPlay, used to protect audio tracks purchased from the iTunes music store. If a person purchases a track from the iTunes store by an artist managed by a record company such as EMI, identify which company or person fulfils each of the DRM component roles shown in Figure 19.2.
![1133_DRM-Components.jpg](https://secure.tutorsglobe.com/CMSImages/1133_DRM-Components.jpg)