Journal of Digital Image Processing and Computer Vision

Author: Suchethana H C

Abstract: Visual cryptography is a cryptographic technique which allows visual information (pictures, text, etc.) to be encrypted in such a way that decryption becomes the job of the person to decrypt via sight reading. Visual Cryptography is a wide area of research used in data hiding, securing images, color imaging, multimedia and other such fields. Visual Cryptography comes in the field of data hiding used in cybercrime, file formats etc. This paper focuses on the application areas of visual cryptography about the most important application areas of visual cryptography. Visual cryptography can be used to protect biometric templates in which decryption does not require any complex computations. a secret image which is encoded into N shares printed on transparencies. The shares appear random and contain no decipherable information about the underlying secret image, however if any 2 of the shares are stacked on top of one another the secret image becomes decipherable by the human eye. Some challenges of visual cryptography example the contrast of the reconstructed image,perfect alinment of the transferencies are projected.