RECORDER FOR WRITE ONCE OPTICAL DISK, AND RECORDING MEDIUM

摘要

PROBLEM TO BE SOLVED: To contrive the discrimination of a write once optical disk of a specified manufactures from other write once optical disks by giving the security function to this write once optical disk only when it is used. SOLUTION: In the recorder for the write once optical disk provided with the user's area for writing user data and the system area utilized by the system when at least this writing operation is performed, the information for the countermeasure as to the security is written into a part of the system area when the manufacture of the above write once optical disk is checked up and found to be the specified manufacturer (thereby the write once optical disk is produced: 'support disk' in figure 8). Only for the write once optical disk produced by the specified manufacturer, the information for the measure as to the security is written into a part of the system area.