METHOD FOR MANAGING COPY PROTECTION INFORMATION OF RECORDING MEDIUM

摘要

A method for managing copy protection information of a recording medium is disclosed. Copy protection information for decrypting A/V data encrypted and recorded in a data area of an optical disc is recorded in a key locker of the disc. Information of makers that have manufactured optical disc drives, drive maker keys of each maker and flags indicating whether drive keys are valid or not is included in association with each other in the key locker. To reproduce the A/V data, the copy protection information is read and decrypted by comparing a drive key managed in the optical disc drive with the key renewal information recorded in the optical disc. Accordingly, illegally duplicated optical disc drives can no longer perform a normal playback operation, thereby effectively suppressing illegal duplication of optical disc drives, which also prevents optical disc drives of all makers from being duplicated at once.