Database Design Scheme for Copyright Protection Using Multimedia Documents Authentication

Many multimedia documents are produced and distributed widely for many applications. And those many multimedia documents are spread fast through the Internet. But there have been illegal behaviors that many unauthorized users transform multimedia and use illegally so, legal issues for copyrighted multimedia arise as a necessary consequence. In this paper, the authors propose a procedure for secure watermarking using authentication key when a multimedia document is used by authorized user in the Internet or distributed information systems. Before a client requests using a multimedia document from the application server, the user acquires authentication key from the authentication server. And then the application inserts a watermark into the multimedia document comparing the client's authentication key with that of authentication server.