Authors: Nabin Ghoshal J K Mandal A Khamrui
Publish Date: 2010/12/07
Volume: 67, Issue: 2, Pages: 187-199
Abstract
The paper presents an image/legaldocument authentication and secures message transmission technique by embedding message/image/messagedigest into color images Image authentication is done by embedding message/image within the image pixels of source image Legal document authentication is done by embedding the authenticating image and self generated message digest generated from signed document part into the image part of the legal document The position of insertion is chosen within each byte of source image using XOR operation between upper three bits of each source byte and k where k is any number from 0 to 7 Three bits of authenticating message/image/messagedigest are embedded in each byte of source image Fabrication process starts with the dimension of authenticating image followed by message digest MD and ends by embedding the content of authenticating message/image To enhance the security further a layer has also been fabricated by XOR operation of the embedded image with another self generated MD key obtained from the source image The decoding is done by applying the reverse algorithm Experimental results are tested with the aid of Histogram analysis noise analysis standard deviation computation and PSNR IF MSE analysis of the source and embedded image and has been compared with popular existing steganographic algorithms like STools where the proposed ATILD is capable to hide large volume of data than STools and shows better performance The proposed ATILD technique also shows high amount of sustainability against various attacks
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