G11B20/00485 - CPC Classification

Signal processing not specific to the method of recording or reproducing; Circuits therefor; Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier characterised by a specific kind of data which is encrypted and recorded on and/or reproduced from the record carrier

• G11B20/00492 » {wherein content or user data is encrypted} 231
• G11B20/00543 » {wherein external data is encrypted, e.g. for secure communication with an external device or for encrypting content on a separate record carrier} 32
• G11B20/0055 » {wherein license data is encrypted} 6
• G11B20/00557 » {wherein further management data is encrypted, e.g. sector headers, TOC or the lead-in or lead-out areas} 94
• G11B20/00565 » {wherein parity data is encrypted} 0