DATA RECORDING MEDIUM, DATA RECORDER AND METHOD, DATA REPRODUCING DEVICE AND METHOD

摘要

PROBLEM TO BE SOLVED: To prevent alternation of recordable amount data, etc. SOLUTION: A data recording and reproducing device is provided with: an optical pickup 62 for reading out a UID (unique ID) for identifying an optical disk 10 from the management area 12 of the optical disk 10, a PA (prepaid amount) showing the recordable capacity of contents data, and an MDC (manipulation/modification detection code) showing the propriety of the UID and PA generated with the UID and the PA; an MDC generating part 70 for generating an MDC with a UID and a PA read out by a reading means; and a comparing part 71 for comparing the MDC generated by the MDC generating part 70 with the MDC read out by the reading means and allowing the contents data to be reproduced when the MDCs coincide with each other.