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Acta Armamentarii ›› 2023, Vol. 44 ›› Issue (8): 2521-2532.doi: 10.12382/bgxb.2022.0275

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Secure Communication Method Based on Dynamic DNA Coding and VMP-WFRFT

WANG Xikang, MENG Qingwei*(), XU Hua, QI Zisen, ZHANG Yue   

  1. Information and Navigation College,Air Force Engineering University, Xi’an 710077, Shaanxi, China
  • Received:2022-04-19 Online:2023-08-30
  • Contact: MENG Qingwei

Abstract:

To improve the information transmission security of the physical layer, a secure communication method based on dynamic DNA coding and variable multi-parameter weighted fractional fourier transform (VMP-WFRFT) is proposed. DNA coding is introduced into bit scrambling. To address the hidden security problem of few existing DNA coding rules, a low complexity four-dimensional chaotic sequence is constructed, and the chaotic sequence is used to randomly select the DNA coding and operation rules of the bit matrix. In order to further mask the signal modulation pattern, the multi-parameter weighted-type fractional fourier transform (MP-WFRFT) parameters are dynamically adjusted by chaotic sequence, so that the modulated signal is transformed by VMP-WFRFT to realize the confusion and diffusion of the constellation, which also enhances the anti-scanning capability of the MP-WFRFT parameters. The simulation results show that the method has good key sensitivity and large key space, and can effectively resist exhaustive attacks. Even if the initial value of chaos as the encryption key has only 10-15 deviations, the bit error rate of the eavesdropper is always maintained at about 0.5.

Key words: physical layer security, chaos encryption, dynamic DNA coding, multi-parameter weighted fractional Fourier transform

CLC Number: