FIELD: information technology.
SUBSTANCE: digital signature is verified using a signature verification method selected from a signature verification method for a digital signature having an official version type, and a signature verification method for a digital signature having a test version type and determining whether to allow display of content recorded on the recording medium based on medium type for the recording medium and signature type of the signature connected to a program and a switching procedure associated with the digital signature for each type of digital signature. This ensures both content copyright protection and efficient manufacture of commercial ROM media.
EFFECT: providing a copyright protection data processing system a display device.
17 cl, 19 dwg
