文章基本信息

标题：A High Quality Cryptography Based Image Steganography Using ASCII Differencing and Three LSB Bits Insertion Method
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作者：Tajinder Singh ; Sukhjit Singh ; Gurvinder Singh 等
期刊名称：International Journal of Advanced Research in Computer Engineering & Technology (IJARCET)
印刷版ISSN：2278-1323
出版年度：2014
卷号：3
期号：3
页码：849-852
出版社：Shri Pannalal Research Institute of Technolgy
摘要：For making more secure data transfer from sender to receiver through a channel due to fast growing in internet, various techniques are used. In thesis paper, we use steganography technique which is based on cryptography. Our Proposed work is divided into two methods. One works on Individual ASCII Code Digit Pair Differencing in which, we encrypt the original data in ASCII Code differencing by constructing digit pair of each ASCII code digit as an individual digit pair vertically. Then horizontally grouping of ASCII code of Key and individual ASCII code difference generate the cipher text string and other works on insertion of lower and reduced higher decimal value in three least significant bits of pixels of cover image. In this, the entire cipher text string is embedded into a cover image having dimensions of 512*512 using proposed method into three Least Significant Bits of pixels.The experimental results show that the proposed method is highly efficient in hiding the information and also secured against attacks. Besides, the embedded secret information can be extracted from cipher image without the assistance of original image. Since peak signal-to-noise ratio (PSNR) and MSE are extensively used as a quality measure of cipher images, the reliability of PSNR and MSE for cipher image is also evaluated in the work described in this paper.
关键词：ASCII code difference; Cipher- Image; ; Cipher -C Text; Indexed Image; LSB; Original information