Visual cryptography scheme for secret color images with color QR codes

Abstract

Visual cryptography scheme can divide the secret image into several shares. It can be used to enhance the secure transmission of the secret image on the Internet. Most schemes cannot fully restore the secret color image and generate meaningful shares. This paper proposes two new schemes by using color XOR to solve these problems. The first proposed scheme generates meaningless shares. The second proposed scheme can generate n−1 meaningful shares and a meaningless share. Based on the first proposed scheme, n−1 shares are modified to color QR codes in the second proposed scheme. These color QR codes can be decoded by the general decoder instead of the standard decoder. All shares are performed the color XOR to restore the secret color image completely. This paper uses some experiments to test two proposed schemes. Experimental results show that the two proposed schemes are feasible.