Image encryption using improved Cubic map and Henon map

In this paper, constructing the improved chaotic map which multiplies output value of by a large value, and subtracts its integer part. Simulation results show that chaos range is enlarged. The generated sequence has strong randomness. A double image encryption algorithm proposed combining maps with permutation diffusion structure. can reduce complexity while ensuring effect. simulation resist statistical attack excellent robustness, good development prospect in information security.