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  Simple algorithmic modifications for improving blind steganalysis performance

Schwamberger, V., & Franz, M. (2010). Simple algorithmic modifications for improving blind steganalysis performance. In P. Campisi, J. Dittmann, & S. Craver (Eds.), MM&Sec '10: Proceedings of the 12th ACM workshop on Multimedia and security (pp. 225-230). New York, NY, USA: ACM Press.

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 Creators:
Schwamberger, V1, 2, Author              
Franz, MO, Author              
Affiliations:
1Department Empirical Inference, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497795              
2Max Planck Institute for Biological Cybernetics, Max Planck Society, Spemannstrasse 38, 72076 Tübingen, DE, ou_1497794              

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 Abstract: Most current algorithms for blind steganalysis of images are based on a two-stages approach: First, features are extracted in order to reduce dimensionality and to highlight potential manipulations; second, a classifier trained on pairs of clean and stego images finds a decision rule for these features to detect stego images. Thereby, vector components might vary significantly in their values, hence normalization of the feature vectors is crucial. Furthermore, most classifiers contain free parameters, and an automatic model selection step has to be carried out for adapting these parameters. However, the commonly used cross-validation destroys some information needed by the classifier because of the arbitrary splitting of image pairs (stego and clean version) in the training set. In this paper, we propose simple modifications of normalization and for standard cross-validation. In our experiments, we show that these methods lead to a significant improvement of the standard blind steganalyzer of Lyu and Farid.

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 Dates: 2010-09
 Publication Status: Published in print
 Pages: -
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 Rev. Type: -
 Identifiers: DOI: 10.1145/1854229.1854268
BibTex Citekey: 6788
 Degree: -

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Title: 12th ACM Workshop on Multimedia and Security (MMSec 2010)
Place of Event: Roma, Italy
Start-/End Date: 2010-09-09 - 2010-09-10

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Title: MM&Sec '10: Proceedings of the 12th ACM workshop on Multimedia and security
Source Genre: Proceedings
 Creator(s):
Campisi, P, Editor
Dittmann, J, Editor
Craver, S, Editor
Affiliations:
-
Publ. Info: New York, NY, USA : ACM Press
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: 225 - 230 Identifier: ISBN: 978-1-4503-0286-9