A Fractional-order Hyper-chaotic System and its Application in Image Encryption
Xue We · Journal of Tianjin University of Science and Technology · 2015
A commensurate fractional-order hyper-chaotic Qi system was analyzed by means of numerical simulation including drawing its phase portraits,Poincare maps,Lyapunov exponent spectra and bifurcation diagrams. Simulation results verified the chaotic characteristics of the fractional order system. After that the application of the fractional-order hyperchaotic Qi system to image encryption was investigated,and the histogram,adjacent pixels correlation,key sensitivity of the ciphertext were analyzed. Results show that the algorithm of image encryption based on fractional hyper-chaotic Qi system has a large key space and high security.