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Proceedings Paper

On locating steganographic payload using residuals
Author(s): Tu-Thach Quach
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Paper Abstract

Locating steganographic payload usingWeighted Stego-image (WS) residuals has been proven successful provided a large number of stego images are available. In this paper, we revisit this topic with two goals. First, we argue that it is a promising approach to locate payload by showing that in the ideal scenario where the cover images are available, the expected number of stego images needed to perfectly locate all load-carrying pixels is the logarithm of the payload size. Second, we generalize cover estimation to a maximum likelihood decoding problem and demonstrate that a second-order statistical cover model can be used to compute residuals to locate payload embedded by both LSB replacement and LSB matching steganography.

Paper Details

Date Published: 10 February 2011
PDF: 7 pages
Proc. SPIE 7880, Media Watermarking, Security, and Forensics III, 78800J (10 February 2011); doi: 10.1117/12.871635
Show Author Affiliations
Tu-Thach Quach, Univ. of New Mexico (United States)


Published in SPIE Proceedings Vol. 7880:
Media Watermarking, Security, and Forensics III
Nasir D. Memon; Jana Dittmann; Adnan M. Alattar; Edward J. Delp, Editor(s)

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