Interactive secret key generation over reciprocal fading channels

Khisti, Ashish

doi:10.1109/allerton.2012.6483378

Cited by 16 publications

(8 citation statements)

References 26 publications

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“…3. The plot marked with circles is an achievable rate using the separation based scheme when the public discussion channel is not available [33]. We do not develop this lower bound in the paper as it appears to exhibit a considerable gap from the upper bound.…”

Section: Numerical Comparisonsmentioning

confidence: 99%

Secret-Key Agreement Over Non-Coherent Block-Fading Channels With Public Discussion

Khisti

2016

IEEE Trans. Inform. Theory

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Fundamental limits of secret-key generation over a two-way, reciprocal and block fading wireless channel are investigated. Only statistical channel state information (CSI) of the main channel is assumed to be available, whereas the eavesdropper has perfect CSI of its own channel. We establish upper and lower bounds on the secret-key generation capacity with public discussion. The upper bound can be expressed as a sum of two terms -one of the terms arises due to channel reciprocity, while the other term arises due to the communication. In the limit of long coherence period, the contribution from channel reciprocity vanishes to zero, whereas the other term prevails. The lower bound involves a separation based scheme consisting of channel training followed by source emulation in each coherence block. The resulting rate also consists of the contribution from each phase. For Rayleigh fading channels, in the high signalto-noise ratio (SNR) regime, the gap between the upper and lower bounds decreases inversely with the coherence period. Numerical results indicate significant performance gains over training-only schemes even for moderate values of SNR and small coherence periods.

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Section: Numerical Comparisonsmentioning

confidence: 99%

Secret-Key Agreement Over Non-Coherent Block-Fading Channels With Public Discussion

Khisti

2016

IEEE Trans. Inform. Theory

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“…In this case, the overall precoder V in (20) should be represented by a finite set of B-bit codebook W = {C 1 , C 2 , . .…”

Section: Precoder Design For Partial Csimentioning

confidence: 99%

Secure Transmission Using MIMO Precoding

Lin

Tsai

Lin

2014

IEEE Trans.Inform.Forensic Secur.

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Abstract-In this paper, we propose an MIMO precoding and postcoding transceiver to achieve data secrecy at the physical layer. When full channel state information (CSI) of the legitimate receiver is known to the transmitter, the proposed precoder can simultaneously maximize to receive signal-to-noise ratio (SNR) and attain secrecy. When only partial CSI is available, a modified Lloyd algorithm is proposed to construct codebooks for quantizing the precoder. As will be explained in this paper, the use of the proposed codebooks does not affect the secrecy of the proposed system. In addition, we propose a low-complexity postcoder to compensate the SNR loss when full CSI is not available. Furthermore, the performance of the proposed system is analyzed from the view points of both recovery rate and secrecy. Based on the analyzed results, we show how to achieve full recovery rate and perfect secrecy for the proposed system. Finally, simulation results corroborate the theoretical results, and show that the proposed system enjoys different advantages when different recovery algorithms are used.Index Terms-Physical layer secrecy, precoding and postcoding, transceiver design, compressive sensing, MIMO wiretap channel, codebook design.

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“…Moreover, the security of the generated key does not depend on the difficulty of computational problems but on the physical properties of the wireless fading channels, thus enabling universality. Given these advantages, SKG based on wireless channels has gained considerable attention [7,8].…”

Section: Introductionmentioning

confidence: 99%

“…Studies on SKG mainly focus on passive eavesdropping, where an eavesdropper located more than halfwave length away from legitimate users will only obtain uncorrelated channel measurements, and thus cannot acquire any information about the generated key [8]. Unfortunately, SKG is vulnerable to active attacks [9][10][11][12] because the eavesdropper not only acquires but actively transmits information to legitimate nodes and contaminates the uniqueness and privacy of the wireless channels, thus intercepting more channel state information (CSI).…”

Section: Introductionmentioning

confidence: 99%

Secret key generation based on private pilot under man-in-the-middle attack

Huang

Jin

et al. 2017

Sci. China Inf. Sci.

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Given the openness and invariance of public pilot, secret key generation (SKG) based on wireless channels is vulnerable to active attacks. In this paper, we explore man-in-the-middle (MITM) attacks, where the attacker acts as a transparent relay to intercept channel state information and deduce the generated keys. To prevent this type of attacks, a dynamic private pilot is generated, where legitimate nodes first consider the information authenticated between them as seed information for the private pilot, and then generate the private pilot based on this seed information according to the pilot requirements. Then, both the new seed information and secret keys are dynamicaally derived from wireless channels that are estimated with the private pilot instead of a public pilot. The proposed private pilot encrypts and authenticates wireless channels, allowing an SKG rate close to that without attackers. Analysis and simulation results show that the proposed SKG approach can effectively withstand an MITM attack. Keywords private pilot, man-in-the-middle attack, secret key generation, physical layer security Citation Huang Y, Jin L, Li N, et al. Secret key generation based on private pilot under man-in-the-middle attack.

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Interactive secret key generation over reciprocal fading channels

Cited by 16 publications

References 26 publications

Secret-Key Agreement Over Non-Coherent Block-Fading Channels With Public Discussion

Secret-Key Agreement Over Non-Coherent Block-Fading Channels With Public Discussion

Secure Transmission Using MIMO Precoding

Secret key generation based on private pilot under man-in-the-middle attack

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