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- W3209252509 abstract "Physical layer key generation is a promising candidate for cryptographic key establishment between two wireless communication parties. It offers information-theoretic security and is an attractive alternative to public-key techniques. Here, the inherent randomness of wireless radio channels is used as a shared entropy source to generate cryptographic key material. However, practical implementations often suffer from static channel conditions which exhibit a limited amount of randomness. In the past, considerable research efforts have been made to address this fundamental limitation. However, current solutions are not generic or require dedicated hardware extensions such as reconfigurable antennas. In this paper, we propose a novel wireless key generation architecture based on randomized channel responses from an intelligent reflecting surface (IRS). Due to its passive nature, a cooperative IRS is well-suited to provide randomness for conventional resource-constrained radios. We conduct the first practical studies to successfully demonstrate IRS-based physical-layer key generation with an OFDM system. In a static environment, using a single subcarrier only, our IRS-assisted prototype system achieves a key generation rate (KGR) of 97.39 bps with 6.5% key disagreement rate (KDR) after quantization, while passing standard randomness tests." @default.
- W3209252509 created "2021-11-08" @default.
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- W3209252509 date "2021-09-13" @default.
- W3209252509 modified "2023-10-01" @default.
- W3209252509 title "Intelligent Reflecting Surface-Assisted Wireless Key Generation for Low-Entropy Environments" @default.
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- W3209252509 doi "https://doi.org/10.1109/pimrc50174.2021.9569556" @default.
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