Journal ArticleDOI
Wireless Information-Theoretic Security
TLDR
A practical secure communication protocol is developed, which uses a four-step procedure to ensure wireless information-theoretic security and is shown that the protocol is effective in secure key renewal-even in the presence of imperfect channel state information.Abstract:
This paper considers the transmission of confidential data over wireless channels. Based on an information-theoretic formulation of the problem, in which two legitimates partners communicate over a quasi-static fading channel and an eavesdropper observes their transmissions through a second independent quasi-static fading channel, the important role of fading is characterized in terms of average secure communication rates and outage probability. Based on the insights from this analysis, a practical secure communication protocol is developed, which uses a four-step procedure to ensure wireless information-theoretic security: (i) common randomness via opportunistic transmission, (ii) message reconciliation, (iii) common key generation via privacy amplification, and (iv) message protection with a secret key. A reconciliation procedure based on multilevel coding and optimized low-density parity-check (LDPC) codes is introduced, which allows to achieve communication rates close to the fundamental security limits in several relevant instances. Finally, a set of metrics for assessing average secure key generation rates is established, and it is shown that the protocol is effective in secure key renewal-even in the presence of imperfect channel state information.read more
Citations
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Journal ArticleDOI
Secure Transmission With Multiple Antennas—Part II: The MIMOME Wiretap Channel
Ashish Khisti,Gregory W. Wornell +1 more
TL;DR: The role of multiple antennas for secure communication is investigated within the framework of Wyner's wiretap channel, and a masked beamforming scheme that radiates power isotropically in all directions attains near-optimal performance in the high SNR regime.
Journal ArticleDOI
Improving Wireless Physical Layer Security via Cooperating Relays
TL;DR: Novel system designs are proposed, consisting of the determination of relay weights and the allocation of transmit power, that maximize the achievable secrecy rate subject to a transmit power constraint, or minimize the transmit powersubject to a secrecy rate constraint.
Journal ArticleDOI
Principles of Physical Layer Security in Multiuser Wireless Networks: A Survey
TL;DR: A comprehensive review of the domain of physical layer security in multiuser wireless networks, with an overview of the foundations dating back to the pioneering work of Shannon and Wyner on information-theoretic security and observations on potential research directions in this area.
Journal ArticleDOI
On the Secrecy Capacity of Fading Channels
TL;DR: The positive impact of fading on the secrecy capacity is revealed and the critical role of rate adaptation, based on the main channel CSI, in facilitating secure communications over slow fading channels is established.
Journal ArticleDOI
Secure Communication Over Fading Channels
TL;DR: In this article, the secrecy capacity region of the fading broadcast channel with confidential messages (BCC) was investigated, where a source node has common information for two receivers (receivers 1 and 2), and has confidential information intended only for receiver 1.
References
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Proceedings ArticleDOI
LDPC-based Gaussian key reconciliation
TL;DR: A new information reconciliation method is proposed which allows two parties sharing continuous random variables to agree on a common bit string and achieves higher efficiency than previously reported results.
Journal ArticleDOI
Some new results for integrals involving the generalized Marcum Q function and their application to performance evaluation over fading channels
TL;DR: The resulting closed-form expressions obtained for these integrals are applied to the error probability evaluation of noncoherent and differentially coherent detection with postdetection equal gain combining over Rayleigh and Nakagami fading channels.
Proceedings ArticleDOI
Secrecy Capacity Region of Fading Broadcast Channels
TL;DR: The fading broadcast channel with confidential messages (BCC) is investigated, where a source node has common information for two receivers and has confidential information intended only for receiver 1, and the secrecy capacity region is established for the Gaussian case of the Csiszar-Korner BCC.
Proceedings ArticleDOI
Capacity of power constrained memoryless AWGN channels with fixed input constellations
TL;DR: A numerical method to compute the capacity of a power constrained memoryless additive white Gaussian noise (AWGN) channel with finite and fixed input alphabets is proposed, based on a modified version of the Blahut-Arimoto algorithm.
Proceedings ArticleDOI
Secret key generation for correlated Gaussian sources
TL;DR: This result specifies the associated tradeoff between quantization rate R and the maximum achievable SK rate and is shown to be optimum among a certain restricted class of schemes for SK generation that involve quantization at rate R of a Gaussian source at one terminal.