Abstract
In today's world, securing data is becoming a very important issue for an individual. Some cryptographic techniques are already discovered and some are yet to be revealed. In this paper, we are surveying an advance method of data hiding i.e. Visual Cryptography. Visual cryptography is an encryption technique which hides the information by using images. The encrypted image can be decrypted by the human vision if the correct image key is used. In visual cryptography, we can transform a secret image into various shared images and the combination of these shared images can reveal the secret original image. This paper reviews about visual cryptography, the three techniques of visual cryptography i.e., Binary Image, Gray-Scale Image and Colored Image with its applications.
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