Abstract:
With the rapid advancement of network
technology, the security of secret data is threatened
because anyone may tend to intrude the system or
eavesdrop via the communication channel. Most
secret sharing schemes are based on cryptography
such that the encryption and decryption processes
need high computation costs. Visual cryptography, a
kind of secret sharing schemes, differs from
traditional secret sharing in terms of the efficient
decryption process. It encrypts a secret image into
several shares and then it can be recovered not only
computer but also human visual system. This paper
presents 2-out-of-3 secret sharing method by using
bit-level decomposition which can be applied to
binary, gray-scale and color images. The secret is
reconstructed by stacking the encrypted shares the
secret image becomes clearly visible. Secret image is
divided into three image shares. These shares are
distributed to each of three users. Any two or all
image shares can be stacked together to recover the
original image perfectly.
