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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Book ChapterDOI
Secrecy capacity of independent parallel channels
Zang Li,Roy D. Yates,Wade Trappe +2 more
TL;DR: The traditional approach is to employ cryptographic algorithms to ensure that only legitimate users can correctly interpret the messages, while all other entities fail to glean any useful information.
Journal ArticleDOI
Reconciliation of a quantum-distributed Gaussian key
TL;DR: A novel construction is presented that allows the legitimate parties to get equal bit strings out of correlated variables by using a classical channel, with as little leaked information as possible, which opens the way to securely correcting nonbinary key elements.
Journal ArticleDOI
Linking information reconciliation and privacy amplification
Christian Cachin,Ueli Maurer +1 more
TL;DR: Borders on the reduction of the Rényi entropy of a random variable induced by side-information are presented, showing that, except with negligible probability, each bit of side- information reduces the size of the key that can be safely distilled by at most two bits.
Proceedings ArticleDOI
Secret communication in presence of colluding eavesdroppers
Satashu Goel,Rohit Negi +1 more
TL;DR: This work considers the problem of secret communications between two nodes over a wireless link in the presence of multiple passive eavesdroppers which may collude and shows how the transmitter can use the multiple antennas to add artificially generated noise to the information signal such that the artificial noise only degrades the eavesdropper's channel.
Proceedings ArticleDOI
Secure Nested Codes for Type II Wiretap Channels
TL;DR: The proposed secure coding scheme is extended to a type II binary symmetric wiretap channel and a new achievable perfect secrecy rate, which improves upon the previously reported result by Thangaraj et al., is derived.