Visual Cryptography for Color Images to Provide Confidentiality Using Embedded System

摘要

RGB Color Visual Cryptography is a type that allows the image to be divided into 2*2 (n*n) multiple numbers of shares knows transparent shares. In existing methods works for color images with 8 colors and even few of them without halftone techniques. Today as per the growth of digital media in world, it is becoming more prevalent to find a method to protect the security of that digital media. We present a visual cryptographic technique for color images in which the generated shares (n*n) are again encrypted. For this XOR operation is used and this will provide double security for the secret document. There is no pixel expansion and hence storage requirement per encrypted image is same as original image without pixel expansion. Encryption is carried out based on RGB (HSV) value of the pixels. Encryption is carried out based on RGB value of the pixels. The quality of the image recovered is same as the original image. The same technique can be used on binary or gray scale images also without any change in the algorithm. RBG Color Visual Cryptography is an exciting era of research where exists a lot of scope.