Modular Digital Watermarking and Corresponding Steganalysis of Images on Publicly Available Web Portals

摘要

The protection of images made available on public web portals on the Internet can be implemented only through technical mechanisms intrinsic to the images themselves. A digital watermarking service can be used in an automated way to provide such a mechanism without human involvement beyond the initial setup of the service and its integration with the web portal software. Images are published only after they pass through the service which supplies them with a proper signature identifying the copyright holder and the terms of use. A complementary steganalysis service identifies the presence of the digital watermarking data and, depending on its usage, retrieves the embedded copyright information.