Information hiding scheme based on optical moiré-pixel matrix

Abstract An information hiding scheme for visual cryptography based on optical moire-pixel matrix is introduced in this paper. The hiding information is formed by black and white unit square visual moire-pixels with half of the period of a visual moire pattern. The moire-pixels can be accurately determined by designing the parameters in the original gratings. To verify the designed information hiding scheme, we experimentally conduct the sharing gratings to decrypt the information by using ordinary low-cost digital printing. The concealment of the sharing gratings is good to ensure the confidentiality. Both the simulation and experimental results show that the provoked scheme can afford enough security demand, yielding that the moire-pixel matrix is a flexible platform for cryptographic security.