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The Scientific World Journal
Volume 2013, Article ID 464107, 7 pages
http://dx.doi.org/10.1155/2013/464107
Research Article

A Graph Theory Practice on Transformed Image: A Random Image Steganography

1School of Electronics Engineering, VIT University, Vellore 632014, India
2School of Information Technology, VIT University, Vellore 632014, India
3School of Electrical & Electronics Engineering, SASTRA University, Thanjavur 613401, India

Received 15 August 2013; Accepted 3 October 2013

Academic Editors: R. Lu and G. Z. Zhao

Copyright © 2013 V. Thanikaiselvan et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Modern day information age is enriched with the advanced network communication expertise but unfortunately at the same time encounters infinite security issues when dealing with secret and/or private information. The storage and transmission of the secret information become highly essential and have led to a deluge of research in this field. In this paper, an optimistic effort has been taken to combine graceful graph along with integer wavelet transform (IWT) to implement random image steganography for secure communication. The implementation part begins with the conversion of cover image into wavelet coefficients through IWT and is followed by embedding secret image in the randomly selected coefficients through graph theory. Finally stegoimage is obtained by applying inverse IWT. This method provides a maximum of 44 dB peak signal to noise ratio (PSNR) for 266646 bits. Thus, the proposed method gives high imperceptibility through high PSNR value and high embedding capacity in the cover image due to adaptive embedding scheme and high robustness against blind attack through graph theoretic random selection of coefficients.