Information hiding scheme based on optical moiré-pixel matrix.

Abstract An information hiding scheme for visual cryptography based on optical moiré-pixel matrix is introduced in this paper. The hiding information is formed by black and white unit square visual moiré-pixels with half of the period of a visual moiré pattern. The moiré-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 moiré-pixel matrix is a flexible platform for cryptographic security. Highlights • Novel scheme for visual cryptography combining moiré pattern and pixel matrix. • Simple encryption and high-quality decryption is provided. • Provides a low-cost and flexible platform for cryptographic security. [ABSTRACT FROM AUTHOR]