计算机科学

计算机科学 ›› 2024, Vol. 51 ›› Issue (5): 390-399.doi: 10.11896/jsjkx.230200169

• 信息安全 • 上一篇    下一篇

基于扰动时空混沌的三维OFDM星座加密方案

赵耿1,2, 吴锐1,2, 马英杰2, 黄思婕1,2, 董有恒2,3   

  1. 1 西安电子科技大学通信工程学院 西安 710071
    2 北京电子科技学院电子与通信工程系 北京 100070
    3 北京邮电大学网络空间安全学院 北京 100089
  • 收稿日期:2023-02-23 修回日期:2023-07-22 出版日期:2024-05-15 发布日期:2024-05-08
  • 通讯作者: 吴锐(ruiwu@stu.xidian.edu.cn)
  • 作者简介:(zg@besti.edu.cn)
  • 基金资助:
    北京高校“高精尖”学科建设项目(3201017);国家自然科学基金(61772047)

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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摘要： 无线通信网络的迅猛发展使得传输信息量迅速增加,这对系统的传输效率和通信安全提出了更高的要求。为满足上述要求,提出了一种基于扰动时空混沌的三维OFDM星座加密方案。首先,设计了一种反馈元胞自动机,以提高元胞自动机的周期性和伪随机性。将反馈元细胞自动机的迭代结果进行归一化后,作为扰动加入时空混沌系统中。通过分岔图、李亚普诺夫指数、回归映射分析和随机性测试,证明了添加该扰动的系统具有良好的混沌特性。其次,设计了一种新的三维16-ary星座图,将星座点之间的最小欧氏距离扩大了6.3%,并结合扰动的时空混沌系统实现了三维星座旋转的物理层调制加密。实验仿真结果表明,与其他三维16-ary星座映射旋转加密算法相比,该算法的误码率性能提高了约1 dB。此外,通过密钥空间、密钥灵敏度和统计攻击的安全分析,证明了其良好的安全性能。

关键词: OFDM, 三维映射, 星座旋转, 时空混沌系统, 初等元胞自动机

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

中图分类号: 

  • TN918.1
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