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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.

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Citations
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Journal ArticleDOI

Eavesdropping-Resilient OFDM System Using Sorted Subcarrier Interleaving

TL;DR: A subcarrier selection algorithm is investigated to realize a trade-off between the eavesdropping resilience and transmission reliability, and the proposed approach requires only minor modifications to off-the-shelf systems and avoids additional resource consumption.
Journal ArticleDOI

State-Secrecy Codes for Networked Linear Systems

TL;DR: In this paper, the authors studied the problem of remote state estimation, in the presence of a passive eavesdropper, and introduced a novel class of codes, termed state-secrecy codes, which use acknowledgment signals from the user and apply linear time-varying transformations to the current and previously received states.
Journal ArticleDOI

Secure Communications Over Wireless Broadcast Networks: Stability and Utility Maximization

TL;DR: A wireless broadcast network model with secrecy constraints is investigated, in which a source node broadcasts K confidential message flows to K user nodes, with each message intended to be decoded accurately by one user and to be kept secret from all other users.
Journal ArticleDOI

On the Secrecy Capacity of the Wiretap Channel With Imperfect Main Channel Estimation

TL;DR: The secrecy capacity of fast fading channels under imperfect main channel estimation at the transmitter is studied and it is proved that the secrecy capacity is asymptotically equal to the capacity of the main channel as if there were no secrecy constraint.
Journal ArticleDOI

Minimum Energy Routing and Jamming to Thwart Wireless Network Eavesdroppers

TL;DR: It is shown that guaranteed security can be achieved in multi-hop networks by augmenting physical layer security techniques, such as cooperative jamming, with the higher layer network mechanisms,such as routing.
References
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Book

Digital Communications

Book

Wireless Communications: Principles and Practice

TL;DR: WireWireless Communications: Principles and Practice, Second Edition is the definitive modern text for wireless communications technology and system design as discussed by the authors, which covers the fundamental issues impacting all wireless networks and reviews virtually every important new wireless standard and technological development, offering especially comprehensive coverage of the 3G systems and wireless local area networks (WLANs).
Journal ArticleDOI

New Directions in Cryptography

TL;DR: This paper suggests ways to solve currently open problems in cryptography, and discusses how the theories of communication and computation are beginning to provide the tools to solve cryptographic problems of long standing.
Journal ArticleDOI

Communication theory of secrecy systems

TL;DR: A theory of secrecy systems is developed on a theoretical level and is intended to complement the treatment found in standard works on cryptography.
Book

Fundamentals of Wireless Communication

TL;DR: In this paper, the authors propose a multiuser communication architecture for point-to-point wireless networks with additive Gaussian noise detection and estimation in the context of MIMO networks.
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