An Image Encryption Algorithm Based on Zigzag Transformation and 3-Dimension Chaotic Logistic Map

An image encryption algorithm based on Zigzag transformation and 3-Dimension Logistic chaotic map by making use of the permutation-diffusion encryption structure is proposed. The algorithm consists of two parts: firstly, Zigzag transformation is used to scramble pixel position of the color image through three channels; then, 3-Dimension Logistic chaotic map is utilized to diffuse pixel values through three channels. To solve the problem of large computation and space overhead of color image encryption algorithm, the iterative chaotic sequences are used several times in the diffusion process to improve encryption efficiency. The key space of the algorithm is large enough to resist brute-force attack and simulation results show that it also has high key sensitivity, high encryption speed and the strong ability to resist exhaustive attack and statistical attack.