The Gaussian multiple access wire-tap channel: Wireless secrecy and cooperative jamming

Ender Tekin, Aylin Yener

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    31 Scopus citations

    Abstract

    We consider the General Gaussian Multiple Access Wire-Tap Channel (GGMAC-WT). In this scenario, multiple users communicate with an intended receiver in the presence of an intelligent and informed eavesdropper. We define two suitable secrecy measures, termed individual and collective, to reflect the confidence in the system for this multi-access environment. We determine achievable rates such that secrecy to some predetermined degree can be maintained, using Gaussian codebooks. We also find outer bounds for the case when the eavesdropper receives a degraded version of the intended receiver's signal. In the degraded case, Gaussian codewords are shown to achieve the sum capacity for collective constraints. In addition, a TDMA scheme is shown to also achieve sum capacity for both sets of constraints. Numerical results showing the new rate region are presented and compared with the capacity region of the Gaussian Multiple-Access Channel (GMAC) with no secrecy constraints. We then find the secrecy sum-rate maximizing power allocations for the transmitters, and show that a cooperative jamming scheme can be used to increase achievable rates in this scenario.

    Original languageEnglish (US)
    Title of host publication2007 Information Theory and Applications Workshop, Conference Proceedings, ITA
    Pages404-413
    Number of pages10
    DOIs
    StatePublished - Dec 1 2007
    Event2007 Information Theory and Applications Workshop, ITA - San Diego, CA, United States
    Duration: Jan 29 2007Feb 2 2007

    Publication series

    Name2007 Information Theory and Applications Workshop, Conference Proceedings, ITA

    Other

    Other2007 Information Theory and Applications Workshop, ITA
    CountryUnited States
    CitySan Diego, CA
    Period1/29/072/2/07

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    All Science Journal Classification (ASJC) codes

    • Information Systems
    • Information Systems and Management

    Cite this

    Tekin, E., & Yener, A. (2007). The Gaussian multiple access wire-tap channel: Wireless secrecy and cooperative jamming. In 2007 Information Theory and Applications Workshop, Conference Proceedings, ITA (pp. 404-413). [4357611] (2007 Information Theory and Applications Workshop, Conference Proceedings, ITA). https://doi.org/10.1109/ITA.2007.4357611