DIGITAL WATERMARK INFORMATION IDENTIFICATION DEVICE, DATA RECORDER, DATA REPRODUCING DEVICE, DATA OUTPUT DEVICE, DISTRIBUTION DEVICE, DISTRIBUTION SYSTEM, CONTENTS DATA, INFORMATION ADDING DEVICE, AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To enable a data processing equipment to protect the copyright of digital contents data distributed via a communication channel without carrying out complicated processing. SOLUTION: In the distribution system 1, a distribution device 11 distributes digital music data embedded with data indicating the data is for distribution when distributing the digital music data. A data reproducing device 12 reproduces the digital music data received via a network N only when the data is embedded with data indicating the data is music data for distribution. A data recorder 15 records the digital music data received via the network N on a recording medium by a recording media drive 152 only when the data in which embedded data indicating that the data is for distribution and its copying is permitted, is embedded.