Multi-User Measurement-Device-Independent Quantum Key Distribution Based on GHZ Entangled State

Hua, Ximing; Hu, Min; Guo, Banghong

doi:10.3390/e24060841

Cited by 8 publications

(5 citation statements)

References 37 publications

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“…It is worth specifying that this paper focuses on the case of point-topoint trusted node QKD networks. Recently, multi-user scenarios have become research hotspots, in particular multi-user QKDN based on entangled states which are in the testing phase [31,32].…”

Section: Scope and Contribution Of Our Workmentioning

confidence: 99%

On the Security of Quantum Key Distribution Networks

Lella,

Schmid

2023

Cryptography

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The main purpose of a quantum key distribution network is to provide secret keys to any users or applications requiring a high level of security, ideally such as to offer the best protection against any computational attack, even of a quantum nature. The keys shared through a point-to-point link between a source and a detector using a quantum key distribution protocol can be proven information-theoretically secure based on the quantum information theory. However, evaluating the security of a quantum key distribution network, especially if it is based on relay nodes, goes far beyond the quantum security of its single quantum links, involving aspects of conventional security for devices and their communication channels. In this contribution, we perform a rigorous threat analysis based on the most recent recommendations and practical network deployment security issues. We show that, at least in the current state of our understanding of quantum cryptography, quantum key distribution networks can only offer computational security and that their security in practical implementations in the shorter term requires resorting to post-quantum cryptography.

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Section: Scope and Contribution Of Our Workmentioning

confidence: 99%

On the Security of Quantum Key Distribution Networks

Lella,

Schmid

2023

Cryptography

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“…Since the proposal of the MDI protocol, research on long-distance and high-rate MDI-QKD in practical networks has increased [39,40], and its use has been extended to free space [41]. In addition, the multi-user scheme of the MDI protocol is useful for resisting detection attacks [42]. Similar to the MDI protocol, the twin-field (TF) protocol is also a three-party protocol.…”

Section: Public Channelmentioning

confidence: 99%

A Resource-Adaptive Routing Scheme with Wavelength Conflicts in Quantum Key Distribution Optical Networks

Zhao

Fan

Dong

et al. 2023

Entropy

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Quantum key distribution (QKD) has great potential in ensuring data security. Deploying QKD-related devices in existing optical fiber networks is a cost-effective way to practically implement QKD. However, QKD optical networks (QKDON) have a low quantum key generation rate and limited wavelength channels for data transmission. The simultaneous arrival of multiple QKD services may also lead to wavelength conflicts in QKDON. Therefore, we propose a resource-adaptive routing scheme (RAWC) with wavelength conflicts to achieve load balancing and efficient utilization of network resources. Focusing on the impact of link load and resource competition, this scheme dynamically adjusts the link weights and introduces the wavelength conflict degree. Simulation results indicate that the RAWC algorithm is an effective approach to solving the wavelength conflict problem. Compared with the benchmark algorithms, the RAWC algorithm can improve service request success rate (SR) by up to 30%.

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“…Multiple-user [ 3 , 15 ] QKD networks are crucial for realizing secure communication in a practical environment. The United States, Europe, and Japan are actively laying out quantum communication networks and applying the to various fields.…”

Section: Introductionmentioning

confidence: 99%

Cost-Optimization-Based Quantum Key Distribution over Quantum Key Pool Optical Networks

Jia

Dong

Kang

et al. 2023

Entropy

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The Measurement-Device-Independent-Quantum Key Distribution (MDI-QKD) has the advantage of extending the secure transmission distances. The MDI-QKD combined with the Hybrid-Trusted and Untrusted Relay (HTUR) is used to deploy large-scale QKD networks, which effectively saves deployment cost. We propose an improved scheme for the QKD network architecture and cost analysis, which simplifies the number of QKD transmitters and incorporates the quantum key pool (QKP) in the QKD network. We developed a novel Hybrid-QKD-Network-Cost (HQNC) heuristic algorithm to solve the cost optimization problem. Simulations verified that the scheme in this paper could save the cost by over 50 percent and 90 percent, respectively.

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Multi-User Measurement-Device-Independent Quantum Key Distribution Based on GHZ Entangled State

Cited by 8 publications

References 37 publications

On the Security of Quantum Key Distribution Networks

On the Security of Quantum Key Distribution Networks

A Resource-Adaptive Routing Scheme with Wavelength Conflicts in Quantum Key Distribution Optical Networks

Cost-Optimization-Based Quantum Key Distribution over Quantum Key Pool Optical Networks

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