A novel extended visual cryptography scheme using one shared image

Abstract

In this paper, a novel extended visual cryptography scheme is presented. Differ from any existing visual cryptography scheme, the proposed scheme encodes one secret image into one shared image with innocent-looking. The secret image is visually revealed by copying the share, shifting the copy and superimposing the shifted copy and the original share together. The proposed scheme has the advantages of resisting geometry distortion, easy recognition and management. Experimental results demonstrate the effectiveness and security of the proposed scheme. Keywords-visual cryptography; extended visual cryptography scheme; one shared imageI.