Engineering Research Publication
With the coming era of electronic commerce, there is an urgent need to solve the problem of ensuring information safety in today's increasingly open network environment. The encrypting technologies of traditional cryptography are usually used to protect information security. Visual cryptography is an emerging cryptography technology. It is a special cryptographic technique where decryption is done by an authorized user by simply overlaying the shares. It uses the characteristics of human vision to decrypt encrypted images. It needs neither cryptography knowledge nor complex computation. For security concerns, it also ensures that hackers cannot observe any clues about a secret image from individual cover images.