Research and achievement of QR code encryption based on cellular automata

To improve the security performance of the information stored in QR (Quick Response) Code, a QR code encryption and decryption method based on elementary cellular automata state rings was proposed in this paper. The cellular automata can simulate complex phenomenon just using simple dynamical system. Based on this feature, the method uses the cellular automata to encrypt and decrypt QR code binary image with such parameters: length is 8, the cyclic boundary conditions and the state space of {0, 1}. The experimental results show that the method proposed in this paper has some advantages, such as high speed, good effect and high security.