Secret Key Generation Rates for Line of Sight Multipath Channels in the Presence of Eavesdroppers
2024 27th International Workshop on Smart Antennas (WSA)(2024)
摘要
In this paper, the feasibility of implementing a lightweight key distribution
scheme using physical layer security for secret key generation (SKG) is
explored. Specifically, we focus on examining SKG with the received signal
strength (RSS) serving as the primary source of shared randomness. Our
investigation centers on a frequency-selective line-of-sight (LoS) multipath
channel, with a particular emphasis on assessing SKG rates derived from the
distributions of RSS. We derive the received signal distributions based on how
the multipath components resolve at the receiver. The mutual information (MI)
is evaluated based on LoS 3GPP channel models using a numerical estimator. We
study how the bandwidth, delay spread, and Rician K-factor impact the estimated
MI. This MI then serves as a benchmark setting bounds for the SKG rates in our
exploration.
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关键词
Secret Key,Presence Of Channels,Multipath Channel,Presence Of Eavesdroppers,Secret Key Generation,Mutual Information,Channel Model,Received Signal Strength,Physical Layer Security,Multipath Components,Delay Spread,Low-pass,Additive Noise,Power Distribution,Numerical Approximation,Distribution Channels,Public Key,Non-line-of-sight,Industrial Internet Of Things,Legitimate Users,Rician Distribution,Line-of-sight Channel,Time Division Duplex,Channel Coherence Time,Security Solutions,Non-centrality Parameter,Receiver Noise,Complex Gaussian Random Variables,Rayleigh Distribution,Channel Impulse Response
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