Etienne Levecque
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View article: Targeted Pooled Latent-Space Steganalysis Applied to Generative Steganography, with a Fix
Targeted Pooled Latent-Space Steganalysis Applied to Generative Steganography, with a Fix Open
Steganographic schemes dedicated to generated images modify the seed vector in the latent space to embed a message, whereas most steganalysis methods attempt to detect the embedding in the image space. This paper proposes to perform stegan…
Compatibility Attack : a Reliable Steganalysis and Forensics Tool for JPEG Images Open
Pour chaque bloc d’une image, le format JPEG utilise des fonctions de compression et de décompression à plusieurs entrées pour une seule sortie. Cette thèse explore les concepts de blocs compatibles et incompatibles. Un bloc est considéré …
View article: Dual JPEG Compatibility: a Reliable and Explainable Tool for Image Forensics
Dual JPEG Compatibility: a Reliable and Explainable Tool for Image Forensics Open
Given a JPEG pipeline (compression or decompression), this paper demonstrates how to find the antecedent of an 8x8 block. If it exists, the block is considered compatible with the pipeline. For unaltered images, all blocks remain compatibl…
View article: Finding Incompatible Blocks for Reliable JPEG Steganalysis
Finding Incompatible Blocks for Reliable JPEG Steganalysis Open
This article presents a refined notion of incompatible JPEG images for a\nquality factor of 100. It can be used to detect the presence of steganographic\nschemes embedding in DCT coefficients. We show that, within the JPEG pipeline,\nthe c…
View article: Compatibility and Timing Attacks for JPEG Steganalysis
Compatibility and Timing Attacks for JPEG Steganalysis Open
This paper introduces a novel compatibility attack to detect a steganographic\nmessage embedded in the DCT domain of a JPEG image at high-quality factors\n(close to 100). Because the JPEG compression is not a surjective function, i.e.\nnot…
View article: Toward Reliable JPEG Steganalysis (at QF100)
Toward Reliable JPEG Steganalysis (at QF100) Open
Contrary to classical steganalysis methods focused on the detection performance, this paper proposes a reliable steganalysis method targeting two goals: prescribing a given, potentially very small, False-Positive (FP) rate while maximizing…
View article: Toward Reliable JPEG Steganalysis (at QF100)
Toward Reliable JPEG Steganalysis (at QF100) Open
-La stéganalyse consiste à détecter des images contenant un message caché. Nous cherchons ici à développer une méthode de stéganalyse qui permette de certifier la stéganalyse en contrôlant la probabilité de faux positifs associée. Pour cel…