A Double Security Approach for Visual Cryptography Using Transform Domain

Visual Cryptography is an approach to share secrets, basically images, which are divided into n shares using the basic principles of Shamir Secret Sharing Schemes. In (t, n) system, the secrets can be retrieved by combining t number of threshold shares from n shares. In the existing system, the attacks by malicious outsider and malicious participant cannot be detected. In this paper, a double security system using transform domain along with the key verification has been proposed to overcome these attacks. Security analysis and quality evaluations ensures that the system is highly secure.