On Cooperative Relaying Schemes for Wireless Physical Layer Security

We consider a cooperative wireless network in the presence of one or more eavesdroppers, and exploit node cooperation for achieving physical (PHY) layer based security. Two different cooperation schemes are considered. In the first scheme, cooperating nodes retransmit a weighted version of the sourc...

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Published in:	IEEE transactions on signal processing Vol. 59; no. 10; pp. 4985 - 4997
Main Authors:	Jiangyuan Li, Petropulu, Athina P., Weber, S.
Format:	Journal Article
Language:	English
Published:	New York, NY IEEE 01.10.2011 Institute of Electrical and Electronics Engineers The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:	Applied sciences Cooperation Detection, estimation, filtering, equalization, prediction Exact sciences and technology Exact solutions Information, signal and communications theory Jamming Mathematical analysis Mathematical models Maximization Node cooperation Noise Optimization Physical layer physical layer based security Protocols Relaying Relays secrecy rate Security semi-definite programming Signal and communications theory Signal, noise Studies Telecommunications and information theory Transmission Wireless networks Relaying Wireless telecommunication physical layer based security Transmission protocol Cooperative systems semi-definite programming Jamming Exact solution Analytical method Signal processing Wireless network Numerical simulation Routing protocols Safety Node cooperation secrecy rate Secrecy
ISSN:	1053-587X, 1941-0476
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Abstract	We consider a cooperative wireless network in the presence of one or more eavesdroppers, and exploit node cooperation for achieving physical (PHY) layer based security. Two different cooperation schemes are considered. In the first scheme, cooperating nodes retransmit a weighted version of the source signal in a decode-and-forward (DF) fashion. In the second scheme, referred to as cooperative jamming (CJ), while the source is transmitting, cooperating nodes transmit weighted noise to confound the eavesdropper. We investigate two objectives: i) maximization of the achievable secrecy rate subject to a total power constraint and ii) minimization of the total power transmit power under a secrecy rate constraint. For the first design objective, we obtain the exact solution for the DF scheme for the case of a single or multiple eavasdroppers, while for the CJ scheme with a single eavesdropper we reduce the multivariate problem to a problem of one variable. For the second design objective, existing work introduces additional constraints in order to reduce the degree of difficulty, thus resulting in suboptimal solutions. Our work raises those constraints, and obtains either an analytical solution for the DF scheme with a single eavesdropper, or reduces the multivariate problem to a problem of one variable for the CJ scheme with a single eavesdropper. Numerical results are presented to illustrate the proposed results and compare them to existing work.
AbstractList	We consider a cooperative wireless network in the presence of one or more eavesdroppers, and exploit node cooperation for achieving physical (PHY) layer based security. Two different cooperation schemes are considered. In the first scheme, cooperating nodes retransmit a weighted version of the source signal in a decode-and-forward (DF) fashion. In the second scheme, referred to as cooperative jamming (CJ), while the source is transmitting, cooperating nodes transmit weighted noise to confound the eavesdropper. We investigate two objectives: i) maximization of the achievable secrecy rate subject to a total power constraint and ii) minimization of the total power transmit power under a secrecy rate constraint. For the first design objective, we obtain the exact solution for the DF scheme for the case of a single or multiple eavasdroppers, while for the CJ scheme with a single eavesdropper we reduce the multivariate problem to a problem of one variable. For the second design objective, existing work introduces additional constraints in order to reduce the degree of difficulty, thus resulting in suboptimal solutions. Our work raises those constraints, and obtains either an analytical solution for the DF scheme with a single eavesdropper, or reduces the multivariate problem to a problem of one variable for the CJ scheme with a single eavesdropper. Numerical results are presented to illustrate the proposed results and compare them to existing work.
Author	Jiangyuan Li Petropulu, Athina P. Weber, S.
Author_xml	– sequence: 1 surname: Jiangyuan Li fullname: Jiangyuan Li email: eejyli@yahoo.com.cn organization: Electr. & Comput. Eng., Rutgers-The State Univ. of New Jersey, New Brunswick, NJ, USA – sequence: 2 givenname: Athina P. surname: Petropulu fullname: Petropulu, Athina P. email: athinap@rci.rutgers.edu organization: Electr. & Comput. Eng., Rutgers-The State Univ. of New Jersey, New Brunswick, NJ, USA – sequence: 3 givenname: S. surname: Weber fullname: Weber, S. email: sweber@ece.drexel.edu organization: Drexel Univ., Philadelphia, PA, USA
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Snippet	We consider a cooperative wireless network in the presence of one or more eavesdroppers, and exploit node cooperation for achieving physical (PHY) layer based...
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SubjectTerms	Applied sciences Cooperation Detection, estimation, filtering, equalization, prediction Exact sciences and technology Exact solutions Information, signal and communications theory Jamming Mathematical analysis Mathematical models Maximization Node cooperation Noise Optimization Physical layer physical layer based security Protocols Relaying Relays secrecy rate Security semi-definite programming Signal and communications theory Signal, noise Studies Telecommunications and information theory Transmission Wireless networks
Title	On Cooperative Relaying Schemes for Wireless Physical Layer Security
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