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Proceedings Paper

Limited distortion in LSB steganography
Author(s): Younhee Kim; Zoran Duric; Dana Richards
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Paper 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.

Paper Details

Date Published: 16 February 2006
PDF: 9 pages
Proc. SPIE 6072, Security, Steganography, and Watermarking of Multimedia Contents VIII, 60720N (16 February 2006); doi: 10.1117/12.650169
Show Author Affiliations
Younhee Kim, George Mason Univ. (United States)
Zoran Duric, George Mason Univ. (United States)
Dana Richards, George Mason Univ. (United States)

Published in SPIE Proceedings Vol. 6072:
Security, Steganography, and Watermarking of Multimedia Contents VIII
Edward J. Delp III; Ping Wah Wong, Editor(s)

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