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Visual cryptography place a vital role in present day's where security is required i.e., where the third party should not extract the secret image. Secret hiding techniques have recently become important in a number of application areas. Research and Development over the past years has lead to significant advances in the field of cryptography. Visual cryptography is based on cryptography where n images are encoded in a way that only the human visual system can decrypt the hidden message without any cryptographic computations when all shares are stacked together. This paper deals with an improved algorithm based on visual cryptography scheme for hiding a gray scale image in to multiple gray scale images.
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