Computer Science

Computer Science ›› 2024, Vol. 51 ›› Issue (5): 390-399.doi: 10.11896/jsjkx.230200169

• Information Security • Previous Articles     Next Articles

Three-dimensional OFDM Constellation Encryption Scheme Based on Perturbed Spatiotemporal Chaos

ZHAO Geng1,2, WU Rui1,2, MA Yingjie2, HUANG Sijie1,2, DONG Youheng2,3   

  1. 1 School of Telecommunication Engineering,Xidian University,Xi'an 710071,China
    2 Department of Electronic and Communication Engineering,Beijing Electronic Science and Technology Institute,Beijing 100070,China
    3 School of Cyberspace Security,Beijing University of Posts and Telecommunications,Beijing 100089,China
  • Received:2023-02-23 Revised:2023-07-22 Online:2024-05-15 Published:2024-05-08
  • About author:ZHAO Geng,born in 1964,Ph.D,professor,Ph.D supervisor His main research interests include chaotic secure communication and information secu-rity.
    WU Rui,born in 1997,postgraduate.His main research interests include communication system and chaotic secure communication.
  • Supported by:
    Sharp Subject Project Construction in Colleges and Universities in Beijing(3201017) and National Natural Science Foundation of China(61772047).

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Abstract: The swift evolution of wireless communication networks has resulted in a substantial surge in transmitted information,thus imposing greater demands on system transmission efficiency and communication security.In order to fulfill these requirements,this paper proposes a 3D OFDM constellation encryption scheme based on perturbed spatiotemporal chaos.Initially,a feedback elementary cellular automaton is devised to enhance the elementary cellular automaton's periodicity and pseudo-randomness.The iterative outcomes of the feedback elementary cellular automaton are normalized and integrated into the spatiotemporal chaos system as a perturbation.It is verified that the system,after incorporating the perturbation,exhibits excellent chaotic pro-perties through bifurcation diagrams,Lyapunov exponents,regression mapping analysis,and randomness tests.Next,a novel three-dimensional 16-ary constellation map is developed to expand the minimum Euclidean distance between constellation points by 6.3%,and the perturbed spatiotemporal chaotic system is combined with the physical layer modulation encryption of the three-dimensional constellation rotation.Experimental simulation outcomes indicate that the proposed algorithm's bit error rate performance is enhanced by roughly 1 dB compared to other 3D 16-ary constellation mapping rotation encryption algorithms.Moreover,security analyses of key space,key sensitivity,and statistical attack prove the superior security performance of the proposed scheme.

Key words: Spatiotemporal Orthogonal frequency division multiplexing, Three-dimensional mapping, Constellation rotation, Spatio-temporal chaotic system, Elementary cellular automata

CLC Number: 

  • TN918.1
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