Enhanced Visual Cryptography Using Quadratic Anisotropic Diffusion

Visual cryptography is a surfacing form of encryption that enables decryption through the use of human eyesight features. This paper covers the implementation of enhancing visual cryptography through quadratic anisotropic diffusion. The initial encryption algorithm takes RGB images and encrypts them into Black and White images. The proposed implementation is to take the output of the original algorithm, apply quadratic anisotropic diffusion to result in the output of a secret crypto image with added noise. The experimental results indicate that the implementation of quadratic anisotropic diffusion improved the overall encryption of the secret image without distorting or affecting the original image. The comparative analysis with related research work shows that the proposed algorithm achieves high level of image confidentiality.