New multilevel DCT, feature vectors, and universal blind steganalysis

Sos S. Agaian; Hong Cai

doi:10.1117/12.588067

21 March 2005 New multilevel DCT, feature vectors, and universal blind steganalysis

Sos S. Agaian, Hong Cai

Proceedings Volume 5681, Security, Steganography, and Watermarking of Multimedia Contents VII; (2005) https://doi.org/10.1117/12.588067
Event: Electronic Imaging 2005, 2005, San Jose, California, United States

Abstract

Universal blind steganalysis can detect hidden messages without using prior information about the steganographic system. Recently, Farid developed a wavelet coefficient, higher-order statistics based, universal blind steganalysis method. This approach is a global method which demonstrated a high-quality in performance standards. Fridrich and Goljan also presented a DCT based local targeted steganalysis method to break the F5 algorithm. However, both Farid’s and Fridrich and Goljan’s methods have some limitations. This paper presents a local universal steganalysis technique combining the advantages of both methods. The basic components of the presented method are: novel DCT multilevel decomposition with wavelet structure; a new set of feature vectors; and a modified kernel function in the Kernel Fisher Discriminant. Experimental results show the presented method offers better performance than commonly used schemes. Inherently, the presented method has the ability to localize the hidden information, it can capture stego information in small blocks, and it is functional using only a small training set.

Citation Download Citation

Sos S. Agaian and Hong Cai "New multilevel DCT, feature vectors, and universal blind steganalysis", Proc. SPIE 5681, Security, Steganography, and Watermarking of Multimedia Contents VII, (21 March 2005); https://doi.org/10.1117/12.588067

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