Accommodative extractor for QIM‐based watermarking schemes

Asymmetric Watermarking Schemes

Unauthorized copying and distribution of digital data is a severe problem in protecting intellectual property rights. The embedding of digital watermarks into multimedia content has been proposed to tackle this problem, and many different schemes have been presented in the last years. However, almost all of them are symmetric, meaning the key used for watermark embedding must be available at th...

Digital Watermarking Schemes for Multimedia Authentication

Collusion Resistant Watermarking Schemes for Cryptographic Functionalities

A cryptographic watermarking scheme embeds message into a program while preserving its functionality. Essential security of the watermarking schemes requires that no one could remove the marking message of a marked program without substantially changing its functionality. In practical applications, it is common to mark a program with multiple different messages, e.g. in the secretleaker tracing...

Geometric Properties of Watermarking Schemes

A variety of image watermarking schemes have been proposed using orthogonal transformations, projections, and coding techniques to embed imperceptible watermarks into images. Analytical studies of the watermarking problem have typically been based on studying the performance limits of these known algorithms. In contrast, this paper formalizes the watermarking problem in an “algorithm independen...

Are Perfect Image Watermarking Schemes Possible?

w Abetract-In this paper we propose mathematical performance measures by which the robustness, imperceptibility and information content of various watermarking methods could be measured. These measures rely in the notion of equivalence in the perceptual domain and some basic information-theoretic concepts. Based on these measures we show that the success of image watermarking heavily depend on ...