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- W2951198456 abstract "We consider a group of $m$ trusted and authenticated nodes that aim to create a shared secret key $K$ over a wireless channel in the presence of an eavesdropper Eve. We assume that there exists a state dependent wireless broadcast channel from one of the honest nodes to the rest of them including Eve. All of the trusted nodes can also discuss over a cost-free, noiseless and unlimited rate public channel which is also overheard by Eve. For this setup, we develop an information-theoretically secure secret key agreement protocol. We show the optimality of this protocol for linear deterministic wireless broadcast channels. This model generalizes the packet erasure model studied in literature for wireless broadcast channels. For state-dependent Gaussian wireless broadcast channels, we propose an achievability scheme based on a multi-layer wiretap code. Finding the best achievable secret key generation rate leads to solving a non-convex power allocation problem. We show that using a dynamic programming algorithm, one can obtain the best power allocation for this problem. Moreover, we prove the optimality of the proposed achievability scheme for the regime of high-SNR and large-dynamic range over the channel states in the (generalized) degrees of freedom sense." @default.
- W2951198456 created "2019-06-27" @default.
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- W2951198456 date "2016-04-08" @default.
- W2951198456 modified "2023-09-27" @default.
- W2951198456 title "Group secret key agreement over state-dependent wireless broadcast channels" @default.
- W2951198456 hasPublicationYear "2016" @default.
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