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16 February 2006Limited distortion in LSB steganography

Younhee Kim,Zoran Duric,Dana Richards

Younhee Kim,¹ Zoran Duric,¹ Dana Richards¹

¹George Mason Univ. (United States)

Proceedings Volume 6072, Security, Steganography, and Watermarking of Multimedia Contents VIII; 60720N (2006)https://doi.org/10.1117/12.650169
Event: Electronic Imaging 2006, 2006, San Jose, California, United States

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Abstract

It is well known that all information hiding methods that modify the least significant bits introduce distortions into the cover objects. Those distortions have been utilized by steganalysis algorithms to detect that the objects had been modified. It has been proposed that only coefficients whose modification does not introduce large distortions should be used for embedding. In this paper we propose an effcient algorithm for information hiding in the LSBs of JPEG coefficients. Our algorithm uses parity coding to choose the coefficients whose modifications introduce minimal additional distortion. We derive the expected value of the additional distortion as a function of the message length and the probability distribution of the JPEG quantization errors of cover images. Our experiments show close agreement between the theoretical prediction and the actual additional distortion.

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Younhee Kim,Zoran Duric, andDana Richards"Limited distortion in LSB steganography", Proc. SPIE 6072, Security, Steganography, and Watermarking of Multimedia Contents VIII, 60720N (16 February 2006);https://doi.org/10.1117/12.650169

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