A NOVEL APPROACH FOR VISUAL CRYPTOGRAPHY BY FUSION OF MULTIPLE SECRET IMAGES
Department of Electronics and Telecommunication Engineering, MES’s Pillai’s Institute Of Information Technology, Media Studies and Research, University of Mumbai, India
ABSTRACT
Internet is one of the most popular but insecure communication mediums. Since it is an open and insecure medium, malicious users can intercept data when people transmit personal information. In order to achieve data security, users need secure communication methods for transmitting secret messages over the Internet. Visual Cryptography (VC) is a technique for achieving data security. It is simply a mechanical process in which the original image can be decoded directly by the human visual system. In VC, one secret image is encoded into n shares that are distributed to participants. Each participant cannot retrieve any information from his own transparency, but when at least k of them superimpose their transparencies pixel by pixel, they retrieve the secret from the superimposed result by using their visual system. In this paper, we propose a method that takes two secret images. These are fused together and shares are generated out of this fused image. At the decoding side, shares are overlapped to get the fused image back and then the original secret images are separated.
