An information recording medium includes an access control area in which access control data (ACD) is recorded, the ACD having common information set to allow a recording/reproducing apparatus that cannot recognize a predetermined function of the information recording medium to control access to the...http://www.google.de/patents/US7663990?utm_source=gb-gplus-sharePatent US7663990 - Optical recording medium having access control area and method for recording or reproducing thereof
