Patent ID: 6902111

Claim:
An optical disc comprising: a data region for storing data to be read and displayed by a reading device; and N security devices located on the disc, outside of said data region, to be sensed by the reading device before the data stored in the data region can be read and displayed; said N security devices being randomly placed relative to each other; where N is an integer greater than 1; wherein the disc has a central region and a first annular ring surrounding the central region and wherein the security devices are located in said first annular ring, and wherein the data region is a second region surrounding the first annular ring, wherein the security devices are one of a machine readable hologram, an optically variable device (OVD) and a radio frequency identification (RFID) chip and wherein security information pertaining to the security devices and the relative positions of the security devices is encoded on the disc; and wherein security information pertaining to the security devices and their relative positions, encoded on the disc, has to be sensed before enabling the data in the second region to be read and displayed.