The role of channel states in secret key generation

Xiang He, Aylin Yener

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

    8 Scopus citations

    Abstract

    In this work, we investigate secret key generation from channel states. We point out, by means of a packet-delay-based attack, that observing its own channel states is not the only way an adversary can learn about the channel states of the legitimate communicating parties. The attack suggests that it is not secure to transmit data via the channel whose states generate secret keys. However, not using the channel at all would result in a waste of bandwidth. Hence, we propose using this channel to transmit the bits needed to reconcile the channel state estimates at the transmitter and the receiver. This is a necessary step in secret key generation that required a separate channel in previous work. Although the scheme proposed here in effect prohibits the use of an adaptive transmitter, we show, for the Rayleigh fading channel, that a decent key rate that outperforms existing schemes is obtained. This is due to the fact that collection of the channel state information and transmission of the reconciliation bits are performed concurrently rather than via time sharing.

    Original languageEnglish (US)
    Title of host publication2010 IEEE 21st International Symposium on Personal Indoor and Mobile Radio Communications, PIMRC 2010
    Pages2681-2686
    Number of pages6
    DOIs
    StatePublished - Dec 1 2010
    Event2010 IEEE 21st International Symposium on Personal Indoor and Mobile Radio Communications, PIMRC 2010 - Istanbul, Turkey
    Duration: Sep 26 2010Sep 30 2010

    Publication series

    NameIEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC

    Other

    Other2010 IEEE 21st International Symposium on Personal Indoor and Mobile Radio Communications, PIMRC 2010
    CountryTurkey
    CityIstanbul
    Period9/26/109/30/10

    All Science Journal Classification (ASJC) codes

    • Electrical and Electronic Engineering

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  • Cite this

    He, X., & Yener, A. (2010). The role of channel states in secret key generation. In 2010 IEEE 21st International Symposium on Personal Indoor and Mobile Radio Communications, PIMRC 2010 (pp. 2681-2686). [5671794] (IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC). https://doi.org/10.1109/PIMRC.2010.5671794