Joint amplitude and phase partition based physical layer key generation method

Nannan LI; Yu HAN; Ning GAO; Shi JIN

doi:10.11959/j.issn.1000-0801.2021106

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Joint amplitude and phase partition based physical layer key generation method

Research and Development | 更新时间：2024-06-05

- Joint amplitude and phase partition based physical layer key generation method
- Telecommunications Science Vol. 37, Issue 5, Pages: 100-112(2021)
- 作者机构：
  
  1. 东南大学移动通信国家重点实验室，江苏南京 210096
  2. 新加坡科技设计大学，新加坡 487372
- 作者简介：
- 基金信息：
- DOI：10.11959/j.issn.1000-0801.2021106
  CLC： TP309
- Published Online：2021-05，
  
  Published：20 May 2021
- 稿件说明：
移动端阅览
Nannan LI, Yu HAN, Ning GAO, et al. Joint amplitude and phase partition based physical layer key generation method[J]. Telecommunications science, 2021, 37(5): 100-112.
DOI：

Nannan LI, Yu HAN, Ning GAO, et al. Joint amplitude and phase partition based physical layer key generation method[J]. Telecommunications science, 2021, 37(5): 100-112. DOI： 10.11959/j.issn.1000-0801.2021106.

摘要

研究基于无线信道物理层特征的密钥生成方法对于提高无线传输的安全性具有重要意义。考虑多径衰落信道下时分双工（time division duplex，TDD）正交频分复用（orthogonal frequency division multiplexing， OFDM）通信系统，利用 OFDM 多载波优势以及信道互易性，联合使用信道频率响应（channel frequency response，CFR）特征的相位与幅度信息，提出了两种应用于无线物理层密钥生成的算法。理论分析和实验仿真表明，提出的算法生成的初始密钥具有更高的一致性和更小的信息协商开销；可以有效增加密钥长度和增强密钥随机性；此外，对于非法用户的窃听以及主动攻击具有较好的防御能力。

Abstract

A key generation method based on wireless channel physical layer features is of great significance for improving security of wireless transmission.An orthogonal frequency division multiplexing (OFDM) communication system based on time division duplex (TDD) with multipath fading channels was considered.Utilizing the advantages of OFDM multicarrier and the channel reciprocity and combining the phase and amplitude information of channel frequency response (CFR)

two algorithms for physical layer key generation were proposed.Theoretical analysis and experimental simulation show that the proposed algorithm has more consistent and smaller overhead in information negotiation

in addition

the proposed algorithm can increase the key length and enhance randomness

and has a better defense capability against eavesdropping and active attacks of the illegal user.

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Keywords

references

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