Attacks on Steganographic Systems
IH '99 Proceedings of the Third International Workshop on Information Hiding
Information Hiding in Text Using Typesetting Tools with Stego-Encoding
ICICIC '06 Proceedings of the First International Conference on Innovative Computing, Information and Control - Volume 1
Research on Steganalysis for Text Steganography Based on Font Format
IAS '07 Proceedings of the Third International Symposium on Information Assurance and Security
IH'04 Proceedings of the 6th international conference on Information Hiding
Performance comparison of two text marking methods
IEEE Journal on Selected Areas in Communications
A novel approach to format based text steganography
Proceedings of the 2011 International Conference on Communication, Computing & Security
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Word shift is a fundamental format based text steganography. It embeds secret information in text by shifting words slightly. Compared with study on steganography, research on its steganalysis is still in its infancy. In this paper, we present a blind steganalysis method to detect word shift in PDF document. Our method is to find features sensitive to word shift and use classifier to learn and remember feature differences between natural document and stego one. In order to design sensitive features, we propose two concepts "neighbor difference" and "environment equal", which reveal the spaces' statistical property. Then, we divided the PDF document into two types to make our method work efficiently. At last, we design a series of experiments to demonstrate performance of our method. The detection accuracy of our method can be up to 93.3%. Our initial results shows that our proposed concepts are very useful in text steganalysis and offer help for other related works.