A COPY-PROTECTED OPTICAL INFORMATION CARRIER AND METHODS FOR ITS MANUFACTURE AND OPERATION

摘要

Use of an optical information carrier such asa CD-ROM (1) is limited to reading and storing of its content in a single computer device by detachment of a security member (9) bonded to a part (8) of the information or data carrying structures storing control data needed for enabling the computer device to complete reading and storing of the information on the disk. By entry into the computer device of a unique secret identification code carried by the security member (9) the computer device is enabled to resume and complete the reading and storing operations, whereas subsequent attempts of reading and storing of the information with a different computer device will fail due to the unavailability of the control data modified by detachment of the security member (9).