DATA TRANSMISSION DEVICE, DATA RECORDING DEVICE, DATA PROCESSING SYSTEM, DATA TRANSMISSION METHOD, AND DATA RECORDING METHOD

摘要

A delivery server (300) in a data processing system (100A) transmits CSS encrypted content data (20), which is obtained by partially encrypting unencrypted content data (10) with a title key, to a host device (410) together with bitmap data (30) and a title key list (40). The host device (410) encrypts the title key list (40) so as to be decryptable with a bus key in a driving device (460) and transfers the encrypted title key list (40) to the driving device (460) together with the bitmap data (30) and main data. According to the title key list (40) decrypted with the bus key and bitmap data (30), the driving device (460) records, on a DVD-R (1), sector data including sector encryption information, in which information indicating not being encrypted is recorded, and unencrypted main data and sector data including sector encryption information, in which the title key is recorded, and encrypted main data.