WATERMARK SYSTEM FOR SECURE DIGITAL MEDIA AND CONTENTS DISTRIBUTION

摘要

PURPOSE: A watermark system for secure digital media and contents distribution is provided to protect the CONSTITUTION: A secret watermark is included in original media contents. The secret watermark is generated with a secret key of a contents owner and indicates authentication signature of the owner. The first open watermark is included in the media contents containing the secret watermark. The first open watermark is generated by the first secret key of the owner and authenticates the first