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Secret Key Generation for Intelligent Reflecting Surface Assisted Wireless Communication Networks

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journal contribution
posted on 2021-02-08, 15:40 authored by Z Ji, PL Yeoh, D Zhang, G Chen, Y Zhang, Z He, H Yin, Y Li
We propose and analyze secret key generation using intelligent reflecting surface (IRS) assisted wireless communication networks. To this end, we first formulate the minimum achievable secret key capacity for an IRS acting as a passive beamformer in the presence of multiple eavesdroppers. Next, we develop an optimization framework for the IRS reflecting coefficients based on the secret key capacity lower bound. To derive a tractable and efficient solution, we design and analyze a semidefinite relaxation (SDR) and successive convex approximation (SCA) based algorithm for the proposed optimization. Simulation results show that employing our IRS-based algorithm can significantly improve the secret key generation capacity for a wide-range of wireless channel parameters.

History

Author affiliation

School of Engineering

Version

  • AM (Accepted Manuscript)

Published in

IEEE Transactions on Vehicular Technology

Publisher

IEEE

issn

0018-9545

eissn

1939-9359

Copyright date

2020

Available date

2020-12-18

Language

en

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