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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Journal ArticleDOI
Secret key agreement by public discussion from common information
TL;DR: It is shown that such a secret key agreement is possible for a scenario in which all three parties receive the output of a binary symmetric source over independent binary asymmetric channels, even when the enemy's channel is superior to the other two channels.
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New hash functions and their use in authentication and set equality
TL;DR: Several new classes of hash functions with certain desirable properties are exhibited, and two novel applications for hashing which make use of these functions are introduced, including a provably secure authentication technique for sending messages over insecure lines and the application of testing sets for equality.
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Generalized privacy amplification
TL;DR: This paper provides a general treatment of privacy amplification by public discussion, a concept introduced by Bennett, Brassard, and Robert for a special scenario, and yields results on wiretap and broadcast channels for a considerably strengthened definition of secrecy capacity.
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Common randomness in information theory and cryptography. I. Secret sharing
Rudolf Ahlswede,Imre Csiszár +1 more
TL;DR: As the first part of a study of problems involving common randomness at distance locations, information-theoretic models of secret sharing (generating a common random key at two terminals, without letting an eavesdropper obtain information about this key) are considered.
Journal ArticleDOI
Bit-interleaved coded modulation
TL;DR: The paper presents in a comprehensive fashion the theory underlying bit-interleaved coded modulation, provides tools for evaluating its performance, and gives guidelines for its design.