METHOD AND APPARATUS FOR REPRODUCING/RECORDING DATA, METHOD FOR CODING DATA, APPARATUS FOR RECORDING AND REPRODUCING DATA, METHOD FOR AUTHENTICATION AND SEMICONDUCTOR CHIP

摘要

PROBLEM TO BE SOLVED: To provide a data reproducing method for reproducing and recording data scrambled in various ways on a recordable recording medium, regardless of whether the data is copy-protected. SOLUTION: The data recording and reproducing apparatus includes: a first reproducing unit 2 for reproducing data; a second reproducing unit 15 for receiving the data processed by the first reproducing unit and executing the next reproducing process; a first authenticating unit 24 for authenticating the first reproducing unit; and a second authenticating unit 27 that corresponds to the first authenticating unit and authenticates the second reproducing unit. The data recording and reproducing apparatus has a plurality of authenticating units (4-6, 8-10) that differ from the first and the second authenticating units and authenticating units for carrying out corresponding authentication and thereby attains descrambling. COPYRIGHT: (C)2010,JPO&INPIT