Securing Digital Images Using visual Cryptography

Visual cryptography technique allows the visual information to be encrypted in such a way that their
decryption can be performed by human visual system. Security has become an inseparable issue as
Information Technology is ruling the world now. Cryptography in the study of mathematical techniques
related aspects of information security such as confidentialities, data security, entity authentication, but it
is not only the means of providing information security, rather one of the techniques. Visual cryptography
can be applied for copy right for images, access control to user images ,visual authentication and
identification any kind images of images like(normal or digital).Visual cryptography is a new technique
which provides information security which user simple algorithm unlike the complex, computationally
intensive algorithms used in other techniques like traditional cryptography. This technique allows visual
information (pictures, text, etc)to be encrypted in such a way that their decryption can be performed by the
human visual system, without any complex cryptographic algorithms. This technique encrypts a secret
image into shares such that stacking sufficient number of shares reveals the secret image. Shares are
visually presented in transparencies.