ULTRAVIOLET ACTIVATING SYSTEM FOR PREVENTING DIGITAL PIRACY FROM RECORDING MEDIA

摘要

An optical medium piracy protection method and system employing an ultraviolet-sensitive state-change material capable of changin state upon activation with ultraviolet light between 253 +/- 25 nm to 365 +/- 25 nm. The state-change material is in association with digital data indicia, wherein when the state-change material is activated to change state by the ultraviolet radiation, the optical mediu changes from an unreadable to a readable condition, or from a less readable to a more readable condition.