CONTENTS VIEWER USING TTS

摘要

PURPOSE: A contents viewer using the TTS(Traitor Trace Scheme) is provided to prevent the outflow of the digital contents by adding a function for tracing the information outflow generated when a user connects to a web site and uses the contents. CONSTITUTION: A traitor tracer(18) traces a traitor draining away the information first. A viewer manager(19) catches a monitoring signal transmitted from the viewer and compares it with the information stored in a user database(30). A user manager(20) confirms login and a password. A contents manager(21) makes a user select the contents by using an index and a use right level of the contents. A contents selector(22) selects a proper watermark extracting method by judging a sort of the contents. A watermark inserter(23) inserts an image by the wavelet transformation. A watermark extractor(24) extracts the marked watermark. A contents password generator(25) encrypts the contents by using a user key. A watermark generator(26) converts a text into an ASCII(American Standard Code for Information Interchange) code by adding a mark used for the watermark to the user information and a contents index, and converts it into an image.