Protection of Pre-recorded/Recordable Medium
The protection of pre-recorded and recordable media is highly dependent on the characteristics of the media itself. We will take a brief tour of the protection methods of the most important types of media, mostly optical media. The tour will be organized in the order of their introduction into the market. Thus, the first section provides an overview of the methods that prevent the duplication of Compact Disks (CD) and other optical media. Then we describe how DVDs protect video, the protection method of Sony’s memory stick, a framework used to protect recordable DVDs and some memory cards. Finally, we introduce the protection scheme used for Blu-ray discs.