VisualCryptography SchemeforColorImages UsingArnoldMappingandModifiedRSA Algorithm

Abstract

Visual cryptography is one of the best techniques used to secure information. It uses the human vision to decrypt the encrypted images without any cryptographic computations, the basic concept of visual cryptography is splitting the secret image into shares such that when the shares are stacked, the secret image is revealed. The Proposed Architecture extended visual cryptographic scheme for color images use Arnold Mapping to ensure that the share pixels are thoroughly scrambled and the random diffusion thoroughly scrambled to remove any correlation with the original image contents, thus it enhances the security of the proposed method. Public key encryption technique makes image shares so secure that it becomes very hard for a third party to decode the secret image information without having required data that is a private key(attacker). Results show that the proposed method suggest an efficient way to encrypt a secret color image with better level of security and with a better value of Peak signal to noise ratio (PSNR), histogram comparisons were also deployed to show the robustness of the proposed cipher.