Optical disc copy management system

摘要: The invention relates to a method of obtaining copy protected optical record carrier carrying information in different blocks, accessing such and an itself. Access means for carriers return results when retrieving which contain incorrect address data the corresponding subcode fields. A protection key will be implemented during manufacture by modifying predetermined pattern blocks. It is normally not possible onto carrier, since newly generated process. Therefore, can utilized distinguish between original disc copied or non disc. preset before manufacturing itself therefore used encrypt stored on carrier. Upon data, first extracted from then decrypted utilizing this key.