An image encryption scheme based on the MLNCML system using DNA sequences

•The image encryption scheme is sensitive to the plaintext image.•The lattice number for encryptions is determined by the plaintext image.•One time pad policy is applied to enhance the security of the scheme.

We propose a new image scheme based on the spatiotemporal chaos of the Mixed Linear–Nonlinear Coupled Map Lattices (MLNCML). This spatiotemporal chaotic system has more cryptographic features in dynamics than the system of Coupled Map Lattices (CML). In the proposed scheme, we employ the strategy of DNA computing and one time pad encryption policy, which can enhance the sensitivity to the plaintext and resist differential attack, brute-force attack, statistical attack and plaintext attack. Simulation results and theoretical analysis indicate that the proposed scheme has superior high security.