An effective key generation system using improved channel reciprocity

Junqing Zhang; Roger Woods; Alan Marshall; Trung Q. Duong

doi:10.1109/ICASSP.2015.7178266

An effective key generation system using improved channel reciprocity

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

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

27 Citations (Scopus)

Abstract

In physical layer security systems there is a clear need to exploit the radio link characteristics to automatically generate an encryption key between two end points. The success of the key generation depends on the channel reciprocity, which is impacted by the non-simultaneous measurements and the white nature of the noise. In this paper, an OFDM subcarriers' channel responses based key generation system with enhanced channel reciprocity is proposed. By theoretically modelling the OFDM subcarriers' channel responses, the channel reciprocity is modelled and analyzed. A low pass filter is accordingly designed to improve the channel reciprocity by suppressing the noise. This feature is essential in low SNR environments in order to reduce the risk of the failure of the information reconciliation phase during key generation. The simulation results show that the low pass filter improves the channel reciprocity, decreases the key disagreement, and effectively increases the success of the key generation.

Original language	English
Title of host publication	2015 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	1727-1731
Number of pages	5
ISBN (Electronic)	9781467369978
DOIs	https://doi.org/10.1109/ICASSP.2015.7178266
Publication status	Published - 04 Aug 2015
Event	IEEE International Conference on Acoustics, Speech, and Signal Processing 2015 - South Brisbane, Australia Duration: 19 Apr 2015 → 24 Apr 2015 https://doi.org/10.1109/ICASSP17257.2015

Conference

Conference	IEEE International Conference on Acoustics, Speech, and Signal Processing 2015
Abbreviated title	ICASSP 2015
Country/Territory	Australia
City	South Brisbane
Period	19/04/2015 → 24/04/2015
Internet address	https://doi.org/10.1109/ICASSP17257.2015

Keywords

channel reciprocity
key disagreement
key generation
low pass filter
Physical layer security

ASJC Scopus subject areas

Signal Processing
Software
Electrical and Electronic Engineering

Access to Document

10.1109/ICASSP.2015.7178266

Cite this

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title = "An effective key generation system using improved channel reciprocity",

abstract = "In physical layer security systems there is a clear need to exploit the radio link characteristics to automatically generate an encryption key between two end points. The success of the key generation depends on the channel reciprocity, which is impacted by the non-simultaneous measurements and the white nature of the noise. In this paper, an OFDM subcarriers' channel responses based key generation system with enhanced channel reciprocity is proposed. By theoretically modelling the OFDM subcarriers' channel responses, the channel reciprocity is modelled and analyzed. A low pass filter is accordingly designed to improve the channel reciprocity by suppressing the noise. This feature is essential in low SNR environments in order to reduce the risk of the failure of the information reconciliation phase during key generation. The simulation results show that the low pass filter improves the channel reciprocity, decreases the key disagreement, and effectively increases the success of the key generation.",

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author = "Junqing Zhang and Roger Woods and Alan Marshall and Duong, {Trung Q.}",

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publisher = "Institute of Electrical and Electronics Engineers Inc.",

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Zhang, J, Woods, R, Marshall, A & Duong, TQ 2015, An effective key generation system using improved channel reciprocity. in 2015 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)., 7178266, Institute of Electrical and Electronics Engineers Inc., pp. 1727-1731, IEEE International Conference on Acoustics, Speech, and Signal Processing 2015, South Brisbane, Queensland, Australia, 19/04/2015. https://doi.org/10.1109/ICASSP.2015.7178266

An effective key generation system using improved channel reciprocity. / Zhang, Junqing; Woods, Roger; Marshall, Alan et al.
2015 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP). Institute of Electrical and Electronics Engineers Inc., 2015. p. 1727-1731 7178266.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

TY - GEN

T1 - An effective key generation system using improved channel reciprocity

AU - Zhang, Junqing

AU - Woods, Roger

AU - Marshall, Alan

AU - Duong, Trung Q.

PY - 2015/8/4

Y1 - 2015/8/4

N2 - In physical layer security systems there is a clear need to exploit the radio link characteristics to automatically generate an encryption key between two end points. The success of the key generation depends on the channel reciprocity, which is impacted by the non-simultaneous measurements and the white nature of the noise. In this paper, an OFDM subcarriers' channel responses based key generation system with enhanced channel reciprocity is proposed. By theoretically modelling the OFDM subcarriers' channel responses, the channel reciprocity is modelled and analyzed. A low pass filter is accordingly designed to improve the channel reciprocity by suppressing the noise. This feature is essential in low SNR environments in order to reduce the risk of the failure of the information reconciliation phase during key generation. The simulation results show that the low pass filter improves the channel reciprocity, decreases the key disagreement, and effectively increases the success of the key generation.

AB - In physical layer security systems there is a clear need to exploit the radio link characteristics to automatically generate an encryption key between two end points. The success of the key generation depends on the channel reciprocity, which is impacted by the non-simultaneous measurements and the white nature of the noise. In this paper, an OFDM subcarriers' channel responses based key generation system with enhanced channel reciprocity is proposed. By theoretically modelling the OFDM subcarriers' channel responses, the channel reciprocity is modelled and analyzed. A low pass filter is accordingly designed to improve the channel reciprocity by suppressing the noise. This feature is essential in low SNR environments in order to reduce the risk of the failure of the information reconciliation phase during key generation. The simulation results show that the low pass filter improves the channel reciprocity, decreases the key disagreement, and effectively increases the success of the key generation.

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KW - key disagreement

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KW - low pass filter

KW - Physical layer security

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BT - 2015 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)

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ER -

An effective key generation system using improved channel reciprocity

Abstract

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Keywords

ASJC Scopus subject areas

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