A pseudo-random number generator for image encryption has been developed,utilizing a spatiotemporal chaotic system with multilayer elementary cellular automata.To solve the existing problems of limited parameter space and local chaotic behavior based on coupled image lattice system,a dynamic random coupled map lattices(DRCML)system based on a multilayer elementary cellular automaton(MECA)is proposed.The MECA is designed on the basis of the ele-mentary cellular automaton(ECA),and DRCML system is iterating with the MECA simultaneously,and the DRCML sys-tem of each lattice in the coupled system and the pseudo-random perturbation method are obtained through the iterative out-put of the MECA.The DRCML system is compared and analyzed by bifurcation diagram,Kolmogorov Sinai entropy and output sequence uniformity,and the correlation between the randomness of the generated sequence of the system and any two lattices is analyzed.The theoretical analysis and experimental results show that the DRCML system has better chaotic properties and wider parameter space than other coupled map lattices systems,and the generated sequences have better ergo-dicity,uniformity and randomness.The results show that the DRCML system has a promising application in the field of cryptography.
维普
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