Uncoordinated Cooperative Jamming for Secret Communications

We consider a Gaussian wiretap channel model with a single-antenna source, destination and eavesdropper. The communication is assisted by multiple multiantenna helpers that transmit noise to confound the eavesdropper. First, we consider a nulling scheme, in which each helper independently transmits...

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Bibliographic Details
Published in:IEEE transactions on information forensics and security 2013-07, Vol.8 (7), p.1081-1090
Main Authors: Shuangyu Luo, Jiangyuan Li, Petropulu, A. P.
Format: Article
Language:English
Subjects:
Access methods and protocols, osi model
Antennas
Applied sciences
Artificial noise
Channels
Computer science
control theory
systems
cooperative jamming
Exact sciences and technology
Gaussian
Interference
Jamming
Mathematical analysis
Memory and file management (including protection and security)
Memory organisation. Data processing
Noise
Nulling
Optimization
outage probability
physical layer security
Probability
Radiocommunications
Relays
Signal to noise ratio
Software
Statistics
Systems, networks and services of telecommunications
Telecommunications
Telecommunications and information theory
Teleprocessing networks. Isdn
Teletraffic
Transmitters. Receivers
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Summary:We consider a Gaussian wiretap channel model with a single-antenna source, destination and eavesdropper. The communication is assisted by multiple multiantenna helpers that transmit noise to confound the eavesdropper. First, we consider a nulling scheme, in which each helper independently transmits noise, designed to maximize the system secrecy rate while creating no interference to the destination. In this scheme, each helper requires only local relay-destination channel state information (CSI). When global CSI is available at the relays, the nulling scheme is not optimal. The optimal jamming noise structure is also provided under global CSI. Interestingly, it is shown both analytically and via simulations that, despite its reduced CSI requirements, the nulling scheme may have secrecy rate performance that is very close to the optimal one. The probability of outage of the nulling scheme is provided in closed form based on the statistics of the eavesdropper CSI.
ISSN:1556-6013
1556-6021
DOI:10.1109/TIFS.2013.2261060