HARD-COAT FOR ANTI-SHRINK-ANTI-COPY OPTICAL MEDIUM

摘要

A recording medium configured to unmask read of data thereon, or a portion of data thereon, upon an optical state change of a state change material on or in the recording medium, said recording medium having a code stored thereon which causes interrogation for a verification material on or in the recording medium and which permits full read of the information stored on the medium only if such verification material is detected in a defined manner.