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- W2585586992 abstract "We consider a Gaussian network consisting of a source that aims to communicate to its legitimate destination via an untrusted relay node in the presence of an external eavesdropper. The source wishes to send two independent messages to the destination: one message must be kept secret from the external eavesdropper only, while the other message must be kept secret from the external eavesdropper and the untrusted relay both. We identify achievable secure rates under these layered secrecy constraints. Considering a two-hop half-duplex setup, we employ the destination as a cooperative jammer in the first phase in order to help provide secrecy from the relay and the external eavesdropper, and the source as a cooperative jammer in the second phase in order to detriment the external eavesdropper. The source encodes its messages using stochastic encoding and security embedding coding. We provide the secrecy analysis and present numerical results to demonstrate the performance of the proposed achievability technique. Our study points to the value of the source serving as a cooperative jammer as well as the need for power control policies at the legitimate nodes in order to ensure secrecy in this system." @default.
- W2585586992 created "2017-02-10" @default.
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- W2585586992 date "2016-12-01" @default.
- W2585586992 modified "2023-09-27" @default.
- W2585586992 title "Two-Hop Untrusted Relay Channel with an External Eavesdropper under Layered Secrecy Constraints" @default.
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- W2585586992 doi "https://doi.org/10.1109/glocom.2016.7842357" @default.
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