MIMO Fast Wireless Secret Key Generation Based on Intelligent Reflecting Surface

TANG Jie; WEN Hong; SONG Huanhuan; WANG Ruifei

doi:10.11999/JEIT210442

Volume 44 Issue 7

Jul. 2022

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Article Navigation > Journal of Electronics & Information Technology > 2022 > 44(7): 2264-2272

TANG Jie, WEN Hong, SONG Huanhuan, WANG Ruifei. MIMO Fast Wireless Secret Key Generation Based on Intelligent Reflecting Surface[J]. Journal of Electronics & Information Technology, 2022, 44(7): 2264-2272. doi: 10.11999/JEIT210442

Citation:

TANG Jie, WEN Hong, SONG Huanhuan, WANG Ruifei. MIMO Fast Wireless Secret Key Generation Based on Intelligent Reflecting Surface[J]. Journal of Electronics & Information Technology, 2022, 44(7): 2264-2272. doi: 10.11999/JEIT210442

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MIMO Fast Wireless Secret Key Generation Based on Intelligent Reflecting Surface

doi: 10.11999/JEIT210442

School of Aeronautics and Astronautics, University of Electronic Science and Technology of China, Chengdu 611731, China

Funds: Sichuan Science and Technology Program (2022YFH0098)

Received Date: 2021-05-19
Rev Recd Date: 2022-03-28

Available Online: 2022-04-07

Publish Date: 2022-07-25

Abstract

Abstract

Recently, there is a growing interest in employing Intelligent Reflecting Surface (IRS) to assist physical layer key generation in wireless networks. However, current works only study the IRS-aided key generation schemes in Single-Input-Single-Output (SISO) communications, which have relatively low promotion of key generation rate. To fill this gap, the IRS-aided Multiple-Input-Multiple-Output (MIMO) key generation scheme is investigated in this paper. By fully exploring the reflection signals at the IRS as the artificial randomness, combined with the MIMO incident signals to build the fast channel, the performance of Key Generate Rate (KGR) can be significantly improved. The information theoretical security and limits of KGR are fully proven, and upper bound expression of KGR performance is derived. Based on this, the security under different eavesdropping attack scenarios are studied, where the eavesdropping attack is launched close to the legitimate transmitter/receiver, and IRS, respectively. It verifies that the proposed scheme improves significantly the KGR and security performance. Finally, the simulations are conducted to verify the proposed scheme and the correctness of theoretical analysis.
- Wireless security,
- Intelligent Reflecting Surface (IRS),
- Physical layer security,
- Secret key generation,
- Multiple-Input-Multiple-Output (MIMO)

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References(25)

References

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