Secret dither estimation in lattice-quantization data hiding: a set membership approach

Luis Pérez-Freire; Fernando Pérez-Gonzalez; Pedro Comesaña

doi:10.1117/12.642688

16 February 2006 Secret dither estimation in lattice-quantization data hiding: a set membership approach

Luis Pérez-Freire, Fernando Pérez-Gonzalez, Pedro Comesaña

Proceedings Volume 6072, Security, Steganography, and Watermarking of Multimedia Contents VIII; 60720W (2006) https://doi.org/10.1117/12.642688
Event: Electronic Imaging 2006, 2006, San Jose, California, United States

Abstract

In this paper, security of lattice-quantization data hiding is considered under a cryptanalytic point of view. Security in this family of methods is implemented by means of a pseudorandom dither signal which randomizes the codebook, preventing unauthorized embedding and/or decoding. However, the theoretical analysis shows that the observation of several watermarked signals can provide sufficient information for an attacker willing to estimate the dither signal, quantifying information leakages in different scenarios. The practical algorithms proposed in this paper show that such information leakage may be successfully exploited with manageable complexity, providing accurate estimates of the dither using a small number of observations. The aim of this work is to highlight the security weaknesses of lattice data hiding schemes whose security relies only on secret dithering.

Citation Download Citation

Luis Pérez-Freire, Fernando Pérez-Gonzalez, and Pedro Comesaña "Secret dither estimation in lattice-quantization data hiding: a set membership approach", Proc. SPIE 6072, Security, Steganography, and Watermarking of Multimedia Contents VIII, 60720W (16 February 2006); https://doi.org/10.1117/12.642688

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