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Synchronization Minimizing Statistical Detectability for Side-Informed JPEG Steganography

Abstract : Current schemes in steganography relying on synchronization are all based on a general heuristic to take into account interactions between embedding changes. However these approaches, while often competitive, lack a clear model for the relationship between pixels/DCT coefficient and the distortion function, and, as such, do not give any guarantees in terms of detectabilty. To solve this problem, we herein propose a synchronized side-informed scheme in the JPEG domain based on minimizing statistical detectability which achieves state-of-the-art performances. This is done by exploiting a statistical model that takes into account correlations between DCT coefficients and adding an optimal steganographic-signal with covariance which is a scaled version of the cover noise covariance. This method allows a clear understanding of the reasons why, depending on the processing pipeline, synchronization using both intra and inter-block dependencies allows such gains in performance.
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https://hal.archives-ouvertes.fr/hal-03006635
Contributor : Quentin Giboulot Connect in order to contact the contributor
Submitted on : Monday, November 16, 2020 - 8:56:07 AM
Last modification on : Tuesday, January 4, 2022 - 6:50:51 AM
Long-term archiving on: : Wednesday, February 17, 2021 - 6:20:16 PM

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Quentin Giboulot, Patrick Bas, Rémi Cogranne. Synchronization Minimizing Statistical Detectability for Side-Informed JPEG Steganography. IEEE International Workshop on Information Forensics and Security, Dec 2020, New York, United States. ⟨10.1109/WIFS49906.2020.9360884⟩. ⟨hal-03006635⟩

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