Design of Boolean XOR based (n, n) Secret Image Sharing Schemes with Contrast and Security Improvement

Abstract

In this research paper, two novel (n, n) secret image sharing schemes are proposed in which all share images are used for reconstruction of secret image(s) instead of threshold number of share images.  The first proposed (n, n) secret image sharing scheme shares single secret image whereas multiple secret images are used for sharing in the second proposed scheme.  The random images are generated by applying circular shift operations.  The share images are generated by applying Boolean Exclusive-OR (XOR) operations on random images and secret image(s).  The XOR operations improve contrast and circular shift operations improve security of the secret image(s).  The proposed schemes are suitable for gray-scale and color images.  The experimental simulation results and comparison with existing schemes provide consistency and feasibility of proposed schemes.