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A Novel Visual Cryptographic Algorithm for Color Images Using Matrix Transpose Technique
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Cryptography is the process of converting the contents from readable format to non-readable format so as to secure the actual contents. Particularly, Visual Cryptography is the process of encrypting images in such a way to decrypt simple by human but not with the aid of any electronic media. For Visual cryptography, numbers of techniques have been proposed before. In this paper, a new Inter Exchange of Pixel Colour Technique (IEPCT) for colour image is proposed. The proposed IEPCT is used colour optimization technique. It has been designed to reduce the number of share images. When using IEPCT, the size of encrypted image is kept same as to the original image. In the proposed model the plain image has internally divided based on RBG channels. Trade-off is done between RBG Channels. Each Channel is considered as M x N matrices. Further the pixels are shuffled using Matrix Transpose Techniques (MTT). Transposed images are fused together to get the encrypted image. The quality of the image is also kept unchanged in this proposed technique.
Keywords
Colour Optimization, IEPCT, Image Shuffling, Information Security, MTT, Visual Cryptography.
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