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- W4385750054 abstract "Physical layer security (PLS) is superior to classical cryptography techniques due to its notion of perfect secrecy and independence to an eavesdropper's computational power. One form of PLS arises when Alice and Bob (the legitimate users) exchange signals to extract a common key from the random common channels. The drawback of extracting keys from wireless channels is the ample dependence on the dynamicity and fluctuations of the radio channel. However, some radio channels are constant such as line of sight (LoS) and can be estimated by Eve (an illegitimate user), or can be quite static in behaviour due to the presence low-mobility users thus restricting the amount of randomness. This in turn lowers the secret key rate (SKR) defined as the number of bits of key generated per channel use. In this work, we aim to address this challenge by using a reconfigurable intelligent surface (RIS) to produce random phases at certain carefully curated intervals such that it disrupts the channel in low entropy environments. We propose an RIS assisted key generation method, study its performance, and compare with benchmarks to observe the benefit of using an RIS while considering various important metrics such as key mismatch rate and average secret key throughput. Simulations are made to validate our theoretical findings showing an improvement in performance when an RIS is deployed." @default.
- W4385750054 created "2023-08-11" @default.
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- W4385750054 date "2023-08-09" @default.
- W4385750054 modified "2023-09-27" @default.
- W4385750054 title "Enhancing Secret Key Generation in Block Fading Channels using Reconfigurable Intelligent Surfaces" @default.
- W4385750054 doi "https://doi.org/10.48550/arxiv.2308.04726" @default.
- W4385750054 hasPublicationYear "2023" @default.
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