Recent Development and Application of Quantum Communication and Security Protocols, Volume II

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Electrical, Electronics and Communications Engineering".

Deadline for manuscript submissions: closed (20 November 2023) | Viewed by 2511

Special Issue Editors


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1. Instituto de Telecomunicações, Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal
2. Departamento de Matemática, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal
Interests: information geometry of Hilbert spaces and many-body physics; topological phases of matter and phase transitions; quantum cryptography; quantum mechanics and gravity; entanglement and indistinguishability; classical, quantum, and total correlations
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LASIGE, Departamento de Informática, Faculdade de Ciências da Universidade de Lisboa, Campo Grande, 016, 1749-016 Lisboa, Portugal
Interests: quantum computation; computational complexity; cryptography; kolmogorov complexity
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Since the establishment of the famous BB84 quantum key distribution protocol, which overcomes the classical counterparts of general key agreement protocols, quantum communication schemes have become a central topic of research triggered by the second quantum revolution.

At present, quantum communication is one of the most prominent emerging quantum technologies, with new applications continually arising, such as the quantum internet, which will become a reality in the near future. To leverage this new reality, new applications of quantum communication are increasingly being developed. In particular, issues of security and privacy have arisen as crucial requirements in a vast number of different applications. While the challenge of secure communication, which is addressed by various key distribution schemes, is the most prominent issue within quantum cryptography, many other unresolved problems have recently attracted the attention of the scientific community. Quantum cryptography beyond key distribution, addressing privacy requirements, ranges from secure multiparty computations (private data mining, e-voting, etc.) to authentication, blind computation, contract signing protocols, secret sharing, etc. The number of novel applications that are more efficient regarding information transmission and require less-expensive resources is so vast that any attempt at a list would be at risk of being incomplete.

Therefore, theoretical as well as computational and experimental studies and papers on new developments and applications of quantum communications are all welcome in this Special Issue.

Dr. Nikola Paunković
Dr. André Souto
Guest Editors

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Keywords

  • quantum communication protocols
  • applications for secure quantum communications
  • key distribution/arrangement schemes
  • secure multi-party computation
  • authentication schemes
  • blind computation
  • contract signing
  • semi-quantum communication applications

Published Papers (3 papers)

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Research

14 pages, 430 KiB  
Article
A New Security Proof for Twin-Field Quantum Key Distribution (QKD)
by Walter O. Krawec
Appl. Sci. 2024, 14(1), 187; https://doi.org/10.3390/app14010187 - 25 Dec 2023
Viewed by 630
Abstract
Twin-field QKD (TF-QKD) protocols allow for increased key rates over long distances when compared to standard QKD protocols. They are even able to surpass the PLOB bound without the need for quantum repeaters. In this work, we revisit a previous TF-QKD protocol and [...] Read more.
Twin-field QKD (TF-QKD) protocols allow for increased key rates over long distances when compared to standard QKD protocols. They are even able to surpass the PLOB bound without the need for quantum repeaters. In this work, we revisit a previous TF-QKD protocol and derive a new, simple, proof of security for it. We also look at several variants of the protocol and investigate their performance, showing some interesting behaviors due to the asymmetric nature of the protocol. Full article
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19 pages, 2388 KiB  
Article
FPLA: A Flexible Physical Layer Authentication Mechanism for Distributing Quantum Keys Securely via Wireless 5G Channels
by Yuxuan Li, Jingyuan Han, Gang Liu, Yi Zhou and Tao Liu
Appl. Sci. 2023, 13(13), 7699; https://doi.org/10.3390/app13137699 - 29 Jun 2023
Cited by 1 | Viewed by 928
Abstract
Quantum Key Distribution (QKD) is popular for establishing a native secure quantum communication network. However, existing QKD networks are built via classical wired fiber channels; it is difficult to distribute quantum keys directly into mobile phones, and no effective candidate solution is available [...] Read more.
Quantum Key Distribution (QKD) is popular for establishing a native secure quantum communication network. However, existing QKD networks are built via classical wired fiber channels; it is difficult to distribute quantum keys directly into mobile phones, and no effective candidate solution is available yet. This paper presents a novel Flexible Physical Layer Authentication (FPLA) mechanism that exploits the unique characteristic of wireless signals from mobile phones to securely distribute quantum keys via wireless 5G channels. In particular, a 5G Up-Link Sounding Reference Signal (SRS)-based transmission model is developed to capture and extract the unique characteristic, which is then used to distribute quantum keys. Moreover, the model could lose accuracy due to SRS variations introduced by 5G Multiuser Multiple-Input Multiple-Output (MU-MIMO), so a dimensional transformation residual network is designed to classify legitimate and malicious user equipment (UE). An average authentication accuracy of 96.8% is proved by FPLA in multiple experiments in a 3 dB Signal-to-Noise Ratio (SNR) test environment with a training dataset of 300 samples per malicious UE. Simulation results show that FPLA is able to adapt to antenna diversity in 5G MU-MIMO systems. Full article
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12 pages, 344 KiB  
Article
An Optical Implementation of Quantum Bit Commitment Using Infinite-Dimensional Systems
by Guang Ping He
Appl. Sci. 2023, 13(13), 7692; https://doi.org/10.3390/app13137692 - 29 Jun 2023
Cited by 1 | Viewed by 510
Abstract
Unconditionally secure quantum bit commitment (QBC) was widely believed to be impossible for more than two decades, but recently, based on an anomalous behavior found in quantum steering, we proposed a QBC protocol which can be unconditionally secure in principle. The protocol requires [...] Read more.
Unconditionally secure quantum bit commitment (QBC) was widely believed to be impossible for more than two decades, but recently, based on an anomalous behavior found in quantum steering, we proposed a QBC protocol which can be unconditionally secure in principle. The protocol requires the use of infinite-dimensional systems, so it may seem less feasible in practice. Here, we propose a quantum optical method based on the Mach–Zehnder interferometer, which gives a very good approximation to such infinite-dimensional systems. Thus, it enables a proof-of-principle experimental implementation of our protocol, which can also serve as a practically secure QBC scheme. Other multi-party cryptographic protocols such as quantum coin tossing can be built upon it too. Our approach also reveals a relationship between infinity and non-locality, which may have an impact on the research of fundamental theories. Full article
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