Steganalysis based on JPEG compatibility

Jessica Fridrich; Miroslav Goljan; Rui Du

doi:10.1117/12.448213

12 November 2001 Steganalysis based on JPEG compatibility

Jessica Fridrich, Miroslav Goljan, Rui Du

Proceedings Volume 4518, Multimedia Systems and Applications IV; (2001) https://doi.org/10.1117/12.448213
Event: ITCom 2001: International Symposium on the Convergence of IT and Communications, 2001, Denver, CO, United States

Abstract

In this paper, we introduce a new forensic tool that can reliably detect modifications in digital images, such as distortion due to steganography and watermarking, in images that were originally stored in the JPEG format. The JPEG compression leave unique fingerprints and serves as a fragile watermark enabling us to detect changes as small as modifying the LSB of one randomly chosen pixel. The detection of changes is based on investigating the compatibility of 8x8 blocks of pixels with JPEG compression with a given quantization matrix. The proposed steganalytic method is applicable to virtually all steganongraphic and watermarking algorithms with the exception of those that embed message bits into the quantized JPEG DCT coefficients. The method can also be used to estimate the size of the secret message and identify the pixels that carry message bits. As a consequence of our steganalysis, we strongly recommend avoiding using images that have been originally stored in the JPEG format as cover-images for spatial-domain steganography.

Citation Download Citation

Jessica Fridrich, Miroslav Goljan, and Rui Du "Steganalysis based on JPEG compatibility", Proc. SPIE 4518, Multimedia Systems and Applications IV, (12 November 2001); https://doi.org/10.1117/12.448213

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