Verification of Key Generation from Individual OFDM Subcarrier's Channel Response

Junqing Zhang, Roger Woods, Alan Marshall, Quang Q. Duong

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

14 Citations (Scopus)
537 Downloads (Pure)


This paper presents a key generation system derived from the channel response of individual subcarrier in orthogonal frequency-division multiplexing (OFDM) systems. Practical aspects of the security were investigated by implementing our key generation scheme on a wireless open-access research platform (WARP), which enables us to obtain channel estimation of individual OFDM subcarriers, a feature not currently available in most commercial wireless interface cards. Channel response of individual OFDM subcarrier is usually a wide sense stationary random process, which allows us to find the optimal probing period and maximize the key generation rate. The implementation requires cross layer design as it involves interaction between physical and MAC layer. We have experimentally verified the feasibility and principles of key generation, and also evaluated the performance of our system in terms of randomness, key generation rate and key disagreement rate, which proves that OFDM subcarrier's channel responses are valid for key generation.
Original languageEnglish
Title of host publication2015 IEEE Globecom Workshops (GC Wkshps)
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages6
ISBN (Print)9781467395267
Publication statusPublished - Dec 2015
EventIEEE 2015 GLOBECOM - San Diego, United States
Duration: 06 Dec 201510 Dec 2015


ConferenceIEEE 2015 GLOBECOM
Country/TerritoryUnited States
CitySan Diego
Internet address


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