Wet paper codes and the dual distance in steganography
Abstract
In 1998 Crandall introduced a method based on coding theory to secretly embed a message in a digital support such as an image. Later Fridrich et al. improved this method to minimize the distortion introduced by the embedding; a process called wet paper. However, as previously emphasized in the literature, this method can fail during the embedding step. Here we find sufficient and necessary conditions to guarantee a successful embedding by studying the dual distance of a linear code. Since these results are essentially of combinatorial nature, they can be generalized to systematic codes, a large family containing all linear codes. We also compute the exact number of solutions and point out the relationship between wet paper codes and orthogonal arrays.
Cite
@article{arxiv.1104.1970,
title = {Wet paper codes and the dual distance in steganography},
author = {Carlos Munuera and Morgan Barbier},
journal= {arXiv preprint arXiv:1104.1970},
year = {2011}
}