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Title: An approach to expose dithering-based JPEG anti-forensics
Authors: Bhardwaj D.
Pankajakshan, Vinod
Published in: Forensic Science International
Abstract: A forensic analyst needs to exploit various kinds of artefacts for developing a powerful forensic technique. Among those, the JPEG compression artefacts such as blocking artefacts & DCT histogram artefacts are the most widely used. JPEG anti-forensic techniques aim to disguise forensic detectors by removing these artefacts. Hence, a technique for the detection of dithering-based JPEG anti-forensic methods is the need of an hour. An approach proposed in this paper exploits the spread of discrete cosine transform (DCT) coefficients around integer multiple of quantization step size with repeated application of dithering-based JPEG anti-forensics. The paper first briefly explains dithering-based state-of-the-art JPEG anti-forensic techniques. Then the proposed method is illustrated thoroughly, and finally, experimental results are reported to demonstrate the accuracy of the proposed method. © 2021 Elsevier B.V.
Citation: Forensic Science International, 328
Issue Date: 2021
Publisher: Elsevier Ireland Ltd
Keywords: Anti-forensics
Blocking artefacts
Discrete cosine transform
Quantization artefacts
ISSN: 3790738
Author Scopus IDs: 57190293585
Author Affiliations: Bhardwaj, D., Department of ECE, Thapar Institute of Engineering & Technology, Patiala, 147004, India
Pankajakshan, V., Department of ECE, Indian Institute of Technology Roorkee, Roorkee, 247667, India
Corresponding Author: Bhardwaj, D.; Department of ECE, India; email:
Appears in Collections:Journal Publications [ECE]

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