An Efficient Advantage Distillation Scheme for Bidirectional Secret-Key Agreement

Feng, Yan; Jiang, Xueqin; Hou, Jia; Wang, Huiming; Yang, Yi

doi:10.3390/e19090505

Cited by 5 publications

(5 citation statements)

References 22 publications

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“…Recently several studies [15], [16], [17], [18] proposed twoway protocols to overcome the positive information difference condition. However, they require several communication rounds.…”

Section: B Novelty Compared With Existing Resultsmentioning

confidence: 99%

Physical Layer Security Protocol for Poisson Channels for Passive Man-in-the-middle Attack

Hayashi,

Vazquez-Castro

2019

Preprint

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In this work, we focus on the classical optical channel having Poissonian statistical behavior and propose a novel secrecy coding-based physical layer protocol. Our protocol is different but complementary to both (computationally secure) quantum immune cryptographic protocols and (information theoretically secure) quantum cryptographic protocols. Specifically, our (information theoretical) secrecy coding protocol secures classical digital information bits at photonic level exploiting the random nature of the Poisson channel.It is known that secrecy coding techniques for the Poisson channel based on the classical one-way wiretap channel (introduced by Wyner in 1975) ensure secret communication only if the mutual information to the eavesdropper is smaller than that to the legitimate receiver. In order to overcome such a strong limitation, we introduce a two-way protocol that always ensures secret communication independently of the conditions of legitimate and eavesdropper channels. We prove this claim showing rigorous comparative derivation and analysis of the information theoretical secrecy capacity of the classical one-way and of the proposed two-way protocols. We also show numerical calculations that prove drastic gains and strong practical potential of our proposed two-way protocol to secure information transmission over optical channels.

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“…Recently several studies [15], [16], [17], [18] proposed twoway protocols to overcome the positive information difference condition. However, they require several communication rounds.…”

Section: B Novelty Compared With Existing Resultsmentioning

confidence: 99%

Physical Layer Security Protocol for Poisson Channels for Passive Man-in-the-middle Attack

Hayashi,

Vazquez-Castro

2019

Preprint

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“…As the price to pay, the protocol requires higher delay to establish the secure channel when compared to the one-way. However, this cost is much cheaper than the previous twoway protocols in the papers [23], [24], [25], [26] because they require many rounds of communication while our protocol requires only two rounds of communication. On the other hand, the transmission of information can be over a public channel while for randomness sharing, the channel needs to be previously authenticated like [29], [28].…”

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confidence: 94%

“…Contribution 3) Our practical two-way protocol outperforms other proposals of two-way protocols [23], [24], [25] in the following sense. First, because while other two-way protocols require several communication rounds, our protocol only requires two rounds.…”

mentioning

confidence: 95%

“…This type of attack is often called passive man-in-the-middle attack [44]. To resolve this problem, the papers [23], [24], [25], [26] introduced two-way protocols, in which, the channels of both directions are noisy Gaussian channels. However, when both channels are noisy Gaussian channels, there still exists a possibility that we cannot realize secure communication dependently of Eve's and Bob's spatial locations.…”

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confidence: 99%

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Two-Way Physical Layer Security Protocol for Gaussian Channels

Hayashi¹,

Vázquez-Castro²

2020

IEEE Trans. Commun.

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In this paper we propose a two-way protocol of physical layer security using the method of privacy amplification against eavesdroppers. First we justify our proposed protocol by analyzing the physical layer security provided by the classic wiretap channel model (i.e. one-way protocol). In the Gaussian channels, the classic one-way protocol requires Eve's channel to be degraded w.r.t. Bob's channel. However, this channel degradation condition depends on Eve's location and whether Eve's receiving antenna is more powerful than Bob's. To overcome this limitation, we introduce a two-way protocol inspired in IEEE TIT (1993) that eliminates the channel degradation condition.In the proposed two-way protocol, on a first phase, via Gaussian channel, Bob sends randomness to Alice, which is partially leaked to Eve. Then, on a second phase, Alice transmits information to Bob over a public noiseless channel. We derive the secrecy capacity of the two-way protocol when the channel to Eve is also Gaussian. We show that the capacity of the twoway protocol is always positive. We present numerical values of the capacities illustrating the gains obtained by our proposed protocol. We apply our result to simple yet realistic models of satellite communication channels.Index Terms-Physical layer security, space links, wiretap coding, one-way protocol, two-way protocol I. INTRODUCTIONPhysical layer security for wireless communications has become a major research topic in recent years because it does not need the computational assumption [1], [2], [3]. Different properties of the wireless channel can be exploited using information theoretical tools to prevent leakage of information towards potential eavesdroppers. The classic wiretap model as first proposed by Wyner [4] and then generalised by I. Csiszár and J. Körner [5] was later strengthened to meet cryptographic security standards in [6] and [7], the latter framed within spectrum information-theoretic methods [8]. We adopt such approach here: we assume the physical layer security realized by a stochastic wiretap encoder [9], [10], [11] based on the privacy amplification method [12], [13].

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“…In [9] a bi-directional advantage distillation is proposed. However, that work focuses only on the last part of advantage distillation, rather than the quantization step.…”

Section: Introductionmentioning

confidence: 99%

Secret-Key-Agreement Advantage Distillation With Quantization Correction

Ardizzon,

Giurisato,

Tomasin

2023

IEEE Commun. Lett.

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We consider a physical layer-based secret-keyagreement (SKA) scenario where Alice and Bob aim at extracting a common bit sequence, which should remain secret to Eve, by quantizing a random number obtained from measurements of their communication channel. We propose an asymmetric advantage distillation protocol where i) Alice quantizes her measurement and sends partial information on it over an authenticated public side channel, and ii) Bob (and Eve) quantizes his measurement by exploiting the partial information. The partial information on the position of the measurement in the quantization interval allows Bob to obtain a quantized value closer to that of Alice. Such strategies are shown to increase the lower bound of the secret key rate.

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An Efficient Advantage Distillation Scheme for Bidirectional Secret-Key Agreement

Cited by 5 publications

References 22 publications

Physical Layer Security Protocol for Poisson Channels for Passive Man-in-the-middle Attack

Physical Layer Security Protocol for Poisson Channels for Passive Man-in-the-middle Attack

Two-Way Physical Layer Security Protocol for Gaussian Channels

Secret-Key-Agreement Advantage Distillation With Quantization Correction

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