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• W2620997600 abstract "We study semantically secure communication over state dependent (SD) wiretap channels (WTCs) with non-causal channel state information (CSI) at the encoder. This model subsumes all other instances of CSI availability as special cases, and calls for an efficient utilization of the state sequence both for reliability and security purposes. A lower bound on the secrecy-capacity, that improves upon the previously best known result by Chen and Han Vinck, is derived based on a novel superposition coding scheme. The improvement over the Chen and Han Vinck result is strict for some SD-WTCs. Specializing the lower bound to the case where CSI is also available to the decoder reveals that it is at least as good as the achievable formula by Chia and El-Gamal, which is already known to outperform the adaptation of the Chen and Han Vinck code to the encoder and decoder CSI scenario. The results are derived under the strict semantic security metric that requires negligible information leakage for all message distributions. The proof of achievability relies on a stronger version of the soft-covering lemma for superposition codes. The lower bound is shown to be tight for a class of reversely less-noisy SD-WTCs, thus characterizing the fundamental limit of reliable a secure communication. An explicit coding scheme that includes a key extraction phase via the random state sequence is also proposed." @default.
• W2620997600 created "2017-06-09" @default.
• W2620997600 creator A5026048440 @default.
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• W2620997600 date "2017-01-01" @default.
• W2620997600 modified "2023-10-16" @default.
• W2620997600 title "Physical Layer Security over Wiretap Channels with Random Parameters" @default.
• W2620997600 cites W1978070031 @default.
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• W2620997600 doi "https://doi.org/10.1007/978-3-319-60080-2_11" @default.
• W2620997600 hasPublicationYear "2017" @default.
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