A New Bayer Matrix-based Scheme of Visual Cryptography for Grey Level Images
AN Shao-jun · Acta Simulata Systematica Sinica · 2004
A visual cryptography scheme for a set P of n participants is a method to encode a secret image into n shadow images called shares, where each participant in set P receives one share. The advantage is that the participants in a qualified set will be able to see the secret image without any knowledge of cryptography and without performing any cryptographic computation. The decoding operation is simple, safe and secure. Its efficacious for secret sharing, whereas visual cryptography scheme for Grey Level Images has its shortcomings: the pixel expansion makes the size of the share transparencies very big. In this paper a new Bayer matrix based scheme of Visual cryptography for grey level images is applied.