Abstract—We propose a simple method for preprocessing cover images to increase the reliability of random LSB replacement steganography in digital images in spatial domain. After the proposed transformation of cover images, most reliable steganalysis methods in the literature such as RS steganalysis, Sample pair method, Least Square method estimate embedding ratio as almost 100% for any amount of hidden data. Thus it causes inaccurate estimation results by the most reliable LSB steganalysis methods thereby increasing the reliability of LSB replacement steganography. The transformation is based on the count of different types of sample pairs in the image and their subsequent change with embedding.
Shreelekshmi R is with the Department of Computer Science& Engineering, College of Engineering, Trivandrum, Kerala-695016 (email: shreelekshmir@cet.ac.in)
M Wilscy is with the Department of Computer Science, University of Kerala, Trivandrum (email: w.ilscy@hotmail.com). C E Veni Madhavan is with the Department of Computer Science& Automation, Indian Institute of Science, Bangalore 560012 (email: cevm@csa.iisc.ernet.in).
Cite: Shreelekshmi R, M Wilscy and M Wilscy, "Preprocessing Cover Images for More Secure LSB Steganography," International Journal of Computer Theory and Engineering vol. 2, no. 4, pp. 546-551, 2010.
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