Chaos Synchronization and Voice Encryption of Discretized Hyperchaotic Chen Based on Euler Algorithm
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In this paper, in order to facilitate the hardware implementation, the hyperchaotic Chen system is discretized based on the Euler algorithm, and the Lyapunov exponent is used to verify that it has the same hyperchaotic characteristics with continuous one. A nonlinear controller is constructed for synchronization of two discrete hyperchaotic Chen systems with the same structure, then the synchronization of it is proved by Lyapunov stability theory. Finally, the secret communication scheme based on nonlinear feedback synchronization is used to transmit the voice signal, which verifies the feasibility and efficiency of it again.
KeywordsEuler algorithm Discrete hyperchaotic Chen system Synchronization Voice encryption
This work was supported by the National Natural Science Foundation of China under Grant 61501176, Natural Science Foundation of Heilongjiang Province F2018025, University Nursing Program for Young Scholars with Creative Talents in Heilongjiang Province UNPYSCT-2016017, and the postdoctoral scientific research developmental fund of Heilongjiang Province in 2017 LBH-Q17149.
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