Secure communication with a relay helping the wire-tapper

Date

2007-01-01

Author

Yüksel Turgut, Ayşe Melda
Erkip, Elza

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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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A four terminal Gaussian network, composed of a single source-destination pair, a relay and a wire-tapper is considered. Unlike the relay channel with a wire-tapper, it is assumed that the relay assists the wire-tapper, not the destination. The relay's objective is to decrease the achievable secrecy rates. However, since the destination is also allowed to listen to the relay's transmission, it also benefits from the relay in terms of achievable rates. Direct transmission, amplify-and-forward (AF), decode-and-forward (DF) and compress-and-forward (CF) relaying schemes are compared in terms of secrecy rates. It is shown that the best relaying strategy depends on relay's location. Comparison of relaying protocols and best power allocation schemes, when the relay assists the source-destination communication, do not readily extend to the case when the relay assists the wire-tapper.

URI

https://hdl.handle.net/11511/96541

DOI

https://doi.org/10.1109/itw.2007.4313141

Conference Name

IEEE Information Theory Workshop

Collections

Department of Electrical and Electronics Engineering, Conference / Seminar

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Citation Formats

A. M. Yüksel Turgut and E. Erkip, “Secure communication with a relay helping the wire-tapper,” presented at the IEEE Information Theory Workshop, California, Amerika Birleşik Devletleri, 2007, Accessed: 00, 2022. [Online]. Available: https://hdl.handle.net/11511/96541.