FIELD: method for controlling copy protection information to prevent unsanctioned copying of encrypted content, recorded on high density data carrier, such as a read-only Blu-ray disk.
SUBSTANCE: in accordance to the method, in the main content data is recorded in encrypted form, then copy protection information, which is necessary to decrypt encrypted data of main content, is recorded in given area of constant information and controlling data. That information is also copied at least once in the area, different from constant information and control data area.
EFFECT: increased efficiency.
2 cl, 8 dwg
