A Novel Image Encryption Based on Hyper-chaotic Financial System
Tang sisi, Wan yaping · 2019
This paper have proposed a hyperchaotic financial system with lorenz-like singular attractor. We using the analysis methods of three-dimensional phase diagram, time-domain diagram and projection diagram to studied the nonlinear dynamic characteristics of the hyperchaotic financial system. And then we proposed a new image encryption algorithm based on the hyperchaos equation. In the first phase, it left mapping position of each pixel exchanged. In the second phase, it using the differential equation of chaotic financial system to generate chaotic sequence and optimize the chaotic sequence. Last but not least, the optimized sequence is used for pixel value diffusion encryption. Experimental results show that the encryption algorithm is not only sensitive to plaintext, but also sensitive to ciphertext. The algorithm relies on the plaintext very sensitively and improves the ability to resist the plaintext attack effectively.