Evaluation of an optimal watermark tampering attack against dirty paper trellis schemes
Proceedings of the 10th ACM workshop on Multimedia and security
Two key estimation techniques for the broken arrows watermarking scheme
Proceedings of the 11th ACM workshop on Multimedia and security
Optimization of natural watermarking using transportation theory
Proceedings of the 11th ACM workshop on Multimedia and security
Spread-spectrum watermarking security
IEEE Transactions on Information Forensics and Security
Scalar Costa scheme for information embedding
IEEE Transactions on Signal Processing
Watermarking security: theory and practice
IEEE Transactions on Signal Processing - Part II
Kerckhoffs-Based Embedding Security Classes for WOA Data Hiding
IEEE Transactions on Information Forensics and Security
Security of Lattice-Based Data Hiding Against the Known Message Attack
IEEE Transactions on Information Forensics and Security
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In this paper we propose an extension of the Scalar-Costa-Scheme (SCS), called Soft-SCS, which offers better or equal achievable rates than SCS for the AWGN channel. After recalling the principle of SCS we highlight its secure implementations regarding the Watermarked contents Only Attack, and we also describe the relations between the alphabet size and the secure embedding parameters. Since the gap between the achievable rates of secure-SCS and SCS is important for low Watermark to Noise Ratios (WNR) regimes, we introduce Soft-SCS, a scheme which enables to achieve security by matching a given distribution of watermarked content while minimizing the embedding distortion. The embedding is given by the optimal transport and the distortion is computed using the transportation theory. Contrary to SCS, the distribution of watermarked contents is not piecewise uniform of width (1-α)Δ, but contains affine portions parametrized by a new embedding parameter β used to maximize the robusness of Soft-SCS. As a consequence, the achievable rates of Soft-SCS for low WNR regimes for both its secure and robust implementations are higher than for SCS. Our conclusions are that (1) the loss of performance between the secure and robust implementations of Soft-SCS for WNR regimes smaller than 0 dB is negligible and (2) the robust implementation of Soft-SCS is equal to SCS for WNR regimes over 0 dB.