Data recording medium, reproduction apparatus; recording apparatus, reproducing method, recording method, computer-readable recorded medium in which reproducing program is recorded, and computer-readable recorded medium in which recording program is recorded

摘要

An optical disc 100 is constituted by a recording region 104 for recording contents data, a readout region 105, and a protect region 106 for recording copyright data of the contents data in this order from an inside. Access cannot be obtained to a groove track outside the readout region 105 except that legal reproduction and recording is performed, and the groove track records a part of contents key data used for encrypting and decoding contents data. <IMAGE>