Pixel Value Differencing Image Steganography using Secret Key
Ankita Sancheti, M.tech Scholar, Department of Computer Science, Mewar University, Chittorgarh, India.
Manuscript received on 12 December 2012 | Revised Manuscript received on 21 December 2012 | Manuscript Published on 30 December 2012 | PP: 68-72 | Volume-2 Issue-1, December 2012 | Retrieval Number: A0372112112 /2012©BEIESP
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: In this paper, secure steganography is used to obtain high capacity of image for data hiding. Both color and gray scale images have been used as cover file for PVD method. Then a secret key is used to control the message embedding process. To estimate how many secret bits will be embedded into the pixel, largest dif erence value between the other three pixels close to the target pixel is used. This makes edge areas of image to be used for higher embedding capacity. In order to avoid the need of a copy of cover file at receiver, size of message file is also embedded in stego file. Thus only stego-image is required at receiver. Peak signal to noise ratio (PSNR) is used to measure the quality of stego images.
Keywords: Steganography, PVD, PSNR, Cryptography
Scope of the Article: Cryptography