New Spatial Domain Steganography Method Based On Similarity Technique

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Author(s) Abdul MonemS.Rahma | Matheel E.Abdulmunim | Rana J.S. Al-Janabi
Pages 45-48
Volume 5
Issue 1
Date January, 2015
Keywords Color Cycle Stego, LSB modification, new indicator technique, hiding information in non-sequential style.

Abstract

In this paper, a new steganography technique based on the similarity between cover RGB image and secret message is depended. Various steganography techniques have been proposed in literature. The Least Significant Bit steganography is one of them in which least significant bit of the image is replaced with data bit. This method is susceptible to steganography analysis and to make it more secure, in this research, cover Bmp image is divided into several blocks. These blocks can be tested to elicit blocks that are most closely resembling to a secret message, then in each block find out two channels that provide the highest similarity to secret message and consider the remaining channel as indicator. So the indicator may be different in each block. In each pixel of these extracted blocks, the indicator can be represented by one bits if there is no hidden data, otherwise, two bits are used, first bit to indicate there is embedded data, second bit to indicate to the channel that store larger number of bits. This method is more secure than conventional least significant bit method through changing sequential data storage style that the least significant bit technique uses, since secret message is divided into portions and each portion is stored into most similar block to it. So, this algorithm gives high peak signal to noise ratio for steganography image and also good capacity since each pixel containing hidden data stores five bits.

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