Data storage, recordal and reproduction

摘要

A data storage medium is disclosed, that comprises a digital data area in which encrypted digital data or non-encrypted digital data is written, a control data area in which control data necessary for reproducing recorded digital data is written, and a copyright control information area in which copyright control information necessary for decrypting encrypted digital data is written, wherein said copyright control information area is write-prohibited, and wherein said control data area is write-permitted.