Optical Technique Tells Fake CDs from the Originals

Pirated CDs and DVDs are a major dent in profits for large companies, considering the fact that some countries use stolen software on 70 to 80 percent of its market. This means that no revenues enter the pockets of the manufacturer, while its products are widely used. Now, scientists at the University of Granada (UG) came up with an ingenious way of detecting which CDs were fake, and which were