TY - JOUR
T1 - Secret Key Generation for Intelligent Reflecting Surface Assisted Wireless Communication Networks
AU - Ji, Zijie
AU - Yeoh, Phee Lep
AU - Zhang, Deyou
AU - Chen, Gaojie
AU - Zhang, Yan
AU - He, Zunwen
AU - Yin, Hao
AU - Li, Yonghui
N1 - Publisher Copyright:
© 1967-2012 IEEE.
PY - 2021/1
Y1 - 2021/1
N2 - 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.
AB - 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.
KW - Intelligent reflecting surface
KW - physical layer security
KW - secret key generation
KW - semidefinite relaxation
KW - successive convex approximation
UR - http://www.scopus.com/inward/record.url?scp=85098180685&partnerID=8YFLogxK
U2 - 10.1109/TVT.2020.3045728
DO - 10.1109/TVT.2020.3045728
M3 - Article
AN - SCOPUS:85098180685
SN - 0018-9545
VL - 70
SP - 1030
EP - 1034
JO - IEEE Transactions on Vehicular Technology
JF - IEEE Transactions on Vehicular Technology
IS - 1
M1 - 9298937
ER -