Cactus Data Shield

Cactus Data Shield (CDS) is a form of CD/DVD copy protection for audio compact discs developed by Israeli company Midbar Technologies. It has been used extensively by EMI (subsequently acquired by Sony Music), BMG and their subsidiaries. CDS relies on two components: Erroneous Disc Navigation and Data Corruption.

As of September 2006, all of Macrovision's CD copy protection products, including CDS, had quietly disappeared from their website. The December 2006 issue of Billboard announced that EMI had decided to abandon Copy Control worldwide.

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