31-07-2012, 01:03 PM
A Novel Approach for Cheating Prevention Through Visual Cryptographic Analysis
Abstract
Confidentiality is probably the most common aspect
of information security and we need to protect our
valuable information and it has become an
inseparable issue as information technology is ruling
the world now. Cryptography is the study of
integer mathematical techniques related aspects of
Information Security such as confidentiality, data
security, entity authentication and data origin
authentication but it is not the only means of
providing information security, rather one of the
techniques. In this paper, a more secure scheme is
given to solve the cheating problem without extra
burdens by adopting multiple distinct secret images.
Moreover, for sharing these secret images
simultaneously, the share construction method of
visual cryptography is redesigned and extended by
generic algorithms. Visual cryptography is a new
technique which provides information security which
uses 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 a sufficient number of
shares reveals the secret image. Shares are usually
presented in transparencies. In this paper we
provide an overview of the emerging Visual
Cryptography (VC) and related security research
work done in this area.