期刊名称：Journal of Theoretical and Applied Information Technology
印刷版ISSN：1992-8645
电子版ISSN：1817-3195
出版年度：2012
卷号：36
期号：1
页码：001-008
出版社：Journal of Theoretical and Applied
摘要：Steganography is a branch of information hiding. It allows the people to communicate secretly. As increasingly more material becomes available electronically, the influence of steganography on our lives will continue to grow. Many confidential information were leaked to a rival firm using steganographic tools that hid the information in music and picture files. The application of steganography is an important motivation for feature selection. In recent years, many successful steganography methods have been proposed. They challenge by steganalysis. Steganalysis (type of attack on steganography Algorithm) Algorithm which detects the stego-message by the statistic analysis of pixel values[1][2], To ensure the security against the steganalysis attack, a new steganographic algorithm for 8bit(grayscale) or 24 bit (colour image) is presented in this paper, based on Logical operation. Algorithm embedded MSB of secret image in to LSB of cover image. in this n LSB of cover image ,from a byte is replaced by n MSB of secret image. the image quality of the stego-image can be greatly improved with low extra computational complexity. The worst case mean-square-error between the stego-image and the cover-image is derived. Experimental results show that the stego-image is visually indistinguishable from the original cover-image when n<=4, because of better PSNR which is achieved by this technique. It comes under the assumption that if the feature is visible, the point of attack is evident, thus the goal here is always to cover up the very existence of the embedded data.
