A Novel Approach for Cheating Prevention through Visual Cryptographic Analysis

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.