High-capacity encryption system based on single-shot-ptychography encoding and QR code

Abstract

Abstract We proposed a high-capacity optical encryption system based on single-shot-ptychography encoding (SPE) technique and quick response (QR) code. Two QR codes are utilized as date containers, one of which is encoded into random binary images (one is encoded image, another one is key) through visual cryptography (VC). Finally, the encoded images are encrypted by single-shot-ptychography encoding technology. It increases the variety of system-keys and overcomes the disadvantages of encrypting only binary images in SPE encoding systems. The security of the proposed system is mainly supported by VC extension encoding. The result of recovery does not have any distortion compared to the original plaintext. Simulation results show that this system has large-capacity information storage, powerful error correction capability, higher security and robustness.