Abstract: Visual cryptography scheme (VCS) is a kind of secret sharing scheme that focuses on sharing the secret images. The basic idea of visual cryptography scheme is to split secret image into number of random shares, here single share does not reveal any information about the secret image but by stacking two shares we can reconstruct the secret image. The underlying operation of the scheme is OR operation. Visual cryptography is one of technique used to encrypt the secret images by dividing the original image into transparencies. The transparencies can be sent to the intended person, and at the other end the transparencies received person can decrypt the transparencies using the tool, thus gets the original image. The proposed Visual cryptography provides the demonstration to the users to show how encryption and decryption can be done to the images. In this technology, the end user identifies an image, which is not the correct image. That is, while transmitting the image the sender will encrypt the image using the application here sender gets the two or more transparencies of the same image. The application provides an option to the end user of encryption. The end user can divide the original image into number of different images. Using the application we can send encrypted images that are in the format of GIF and PNG. The encrypted transparencies can be saved in the machine and can be sent to the intended person by other means.
Keywords: Image processing, visual Cryptography Scheme (VCS), GIF Encoding, Decoding.
Title: Embedded Extended Visual Cryptography Schemes for Secret Image Using LZW Data Compression Algorithm
Author: Darshana R Wadde, Prof. B. A. Patil
International Journal of Computer Science and Information Technology Research
ISSN 2348-1196 (print), ISSN 2348-120X (online)
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