A Method for Detecting Amplitude-Phase Joint Characteristic Parameters of Wireless Channel for Generating Key Parameters

Qiongying Tan,Shuanglin Huang,Sanjun Liu,Zhihan Lv

doi:10.1155/2021/9951742

Abstract

Aiming at the problems of poor adaptability and low secret key generation rate of secret key generation scheme based on single characteristic parameter of wireless channel, a secret key generation method based on joint characteristic parameters of amplitude and phase of wireless channel is proposed. This method is based on the single-eavesdropping wireless fading channel model; the joint characteristic model of amplitude and phase of wireless fading channel is established; it detects and extracts the joint characteristic parameters of amplitude and phase of channel, and then the proposed characteristics are quantified by using the equal probability joint quantization strategy of amplitude and phase to generate the secret key random parameters. In this paper, the amplitude and phase joint feature parameter detection method of wireless channel can not only improve the generation rate of random secret key parameters but also make the eavesdropping party’s eavesdropping error rate closer to 0.5. The test results show that the proposed scheme can significantly improve the rate, reliability, and security of generating key random parameters.

Highlights

With the rapid promotion of Internet of ings technology and the explosive growth of the number of wireless users, various wireless communication security issues have aroused widespread concern in the academic community [1, 2]
Due to the complexity of the wireless communication network topology, the openness of wireless channel transmission, and the mobility of wireless communication terminals, it is difficult for traditional communication security mechanisms based on modern cryptography to guarantee the security of wireless communication systems [3, 4]
Complexity based on channel phase characteristics [20, 21], channel multipath delay [22], channel state information (CSI) [23, 24], and channel frequency response (CFR) [25, 26] has been proposed one after another, which improved the secret key generation rate to a certain extent

Summary

Introduction

With the rapid promotion of Internet of ings technology and the explosive growth of the number of wireless users, various wireless communication security issues have aroused widespread concern in the academic community [1, 2]. Because RSS is greatly affected by the location of both parties in communication, the amount of information provided is small, resulting in a low the secret key generation rate and poor solution adaptability In response to this problem, the secret key extraction method. Complexity based on channel phase characteristics [20, 21], channel multipath delay [22], channel state information (CSI) [23, 24], and channel frequency response (CFR) [25, 26] has been proposed one after another, which improved the secret key generation rate to a certain extent. In view of the above problems, considering the actual communication scenario, a secret key generation scheme based on the joint characteristic parameters of the wireless channel amplitude and phase is proposed. E locations of Eve, Alice, and Bob are not the same; that is, the channel transmission characteristics hAE and hBE between Eve, Alice, and Bob are completely different from the main channel characteristics hAB and hBA, making Eve unable to obtain any information about hAB and hBA. e above guarantees the security of the random parameter extraction of the wireless channel characteristic secret key

The Secret Key Generation Scheme Design

AB is which satisfies the average power of Bob’s received signal σ

Performance Analysis

ΔθA and σ

Experiment and Result