Wet paper codes with improved embedding efficiency

Jessica Fridrich; Miroslav Goljan; David Soukal

doi:10.1117/12.640110

16 February 2006 Wet paper codes with improved embedding efficiency

Jessica Fridrich, Miroslav Goljan, David Soukal

Proceedings Volume 6072, Security, Steganography, and Watermarking of Multimedia Contents VIII; 607215 (2006) https://doi.org/10.1117/12.640110
Event: Electronic Imaging 2006, 2006, San Jose, California, United States

Abstract

Construction of steganographic schemes in which the sender and the receiver do not share the knowledge about the location of embedding changes requires wet paper codes. Steganography with non-shared selection channels empowers the sender as now he is able to embed secret data by utilizing arbitrary side information, including a high-resolution version of the cover object (perturbed quantization steganography), local properties of the cover (adaptive steganography), and even pure randomness, e.g., coin flipping, for public key steganography. In this paper, we propose a new approach to wet paper codes using random linear codes of small codimension that at the same time improves the embedding efficiency-the number of message bits embedded per embedding change. We describe a practical algorithm, test its performance experimentally, and compare the results to theoretically achievable bounds. We point out an interesting ripple phenomenon that should be taken into account by practitioners. The proposed coding method can be modularly combined with most steganographic schemes to allow them to use non-shared selection channels and, at the same time, improve their security by decreasing the number of embedding changes.

Citation Download Citation

Jessica Fridrich, Miroslav Goljan, and David Soukal "Wet paper codes with improved embedding efficiency", Proc. SPIE 6072, Security, Steganography, and Watermarking of Multimedia Contents VIII, 607215 (16 February 2006); https://doi.org/10.1117/12.640110

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