A Secure Scheme Based on a Hybrid of Classical-Quantum Communications Protocols for Managing Classical Blockchains

Article Quantum Science & Technology

A quantum hash function with grouped coarse-grained boson sampling

Jinjing Shi et al.

Summary: This paper proposes a quantum hash function based on grouped coarse-grained boson sampling, which utilizes the multi-photon characteristics of boson sampling to reduce experimental difficulty while ensuring result determinacy.

QUANTUM INFORMATION PROCESSING (2022)

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Article Computer Science, Information Systems

A verifiable multi-party quantum key distribution protocol based on repetitive codes

Lei Li et al.

Summary: The protocol designed in this paper is a multi-party quantum key distribution protocol based on repetitive code, which can authenticate participant identity, resist attacks, and does not require decoy state particles, making it more efficient and saving quantum resources than similar protocols.

INFORMATION SCIENCES (2022)

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Article Physics, Multidisciplinary

Quantum State Transfer over 1200 km Assisted by Prior Distributed Entanglement

Bo Li et al.

Summary: Long-distance quantum state transfer is a core element of important quantum protocols, but implementing Bell-state measurement after photon propagation in atmospheric channels is challenging due to atmospheric turbulence. By developing a stable interferometer and utilizing a satellite-borne entangled photon source, proof-of-principle QST was demonstrated at a distance of over 1200 km with an average fidelity of 0.82±0.01.

PHYSICAL REVIEW LETTERS (2022)

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Article Multidisciplinary Sciences

Quantum blockchain based on asymmetric quantum encryption and a stake vote consensus algorithm

Wusheng Wang et al.

Summary: This article proposes a blockchain algorithm based on asymmetric quantum encryption and stake vote consensus algorithm, which can effectively resist the threat of quantum computation on blockchain technology and provide better protection and security.

SCIENTIFIC REPORTS (2022)

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Article Mathematics

A Hash-Based Quantum-Resistant Designated Verifier Signature Scheme

P. Thanalakshmi et al.

Summary: This paper presents a hash-based multi-time designated verifier signature scheme that ensures signer anonymity and resists chosen message attacks, while investigating properties such as non-transferability and non-delegatability.

MATHEMATICS (2022)

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Article Quantum Science & Technology

Quantum-assisted blockchain for IoT based on quantum signature

Fang Ye et al.

Summary: The Internet of things (IoT) devices are vulnerable to attacks due to lack of trust and coordination mechanisms. Blockchain provides low-cost credible communication for IoT nodes. However, traditional digital signature algorithms are not secure enough against quantum computing attacks. Therefore, we propose a quantum-assisted blockchain of things (QBoT) based on quantum signature to protect IoT systems and ensure secure communication between nodes.

QUANTUM INFORMATION PROCESSING (2022)

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Article Computer Science, Theory & Methods

Efficient Quantum Blockchain With a Consensus Mechanism QDPoS

Qin Li et al.

Summary: Quantum blockchain is a promising technology to defend against malicious attacks from future quantum computers. Existing quantum blockchain schemes suffer from low efficiency due to the lack of a suitable consensus mechanism. To address this issue, a quantum delegated proof of stake (QDPoS) consensus mechanism is proposed, enabling fast decentralization. Based on QDPoS, an efficient quantum blockchain scheme is designed, integrating classical information into quantum states, providing better adaptation to the challenges of the quantum era.

IEEE TRANSACTIONS ON INFORMATION FORENSICS AND SECURITY (2022)

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Article Multidisciplinary Sciences

An integrated space-to-ground quantum communication network over 4,600 kilometres

Yu-Ao Chen et al.

Summary: Quantum key distribution has shown promise in enabling secure communication, with successful demonstrations in the laboratory and small-scale networks tested outside. However, global deployment faces challenges due to current technological limitations, although quantum repeaters could potentially provide a solution.

NATURE (2021)

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Article Computer Science, Information Systems

Quantum-Inspired Blockchain-Based Cybersecurity: Securing Smart Edge Utilities in IoT-Based Smart Cities

Ahmed A. Abd El-Latif et al.

Summary: Blockchain plays a crucial role in cybersecurity, and a quantum-inspired quantum walks protocol is proposed for secure data transmission among IoT devices, offering advantages of effectively sharing data and full control of records.

INFORMATION PROCESSING & MANAGEMENT (2021)

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Article Physics, Applied

Quantum blockchain system

Xiao-Jun Wen et al.

Summary: Blockchain technology, represented by Bitcoin and Ethereum, has gained significant development and widespread use due to its broad application prospects in digital currency and IoT. However, the security of existing blockchain technologies built on classical cryptography faces serious threats as attackers' computing power, especially with the emergence of quantum computers. A proposed quantum blockchain system based on quantum hash, quantum SWAP test, and quantum teleportation provides unconditional security unrelated to attackers' computing power and resources in classical cryptographic theory.

MODERN PHYSICS LETTERS B (2021)

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Article Quantum Science & Technology

Quantum algorithm for quantum state discrimination via partial negation and weak measurement

Doha A. Rizk et al.

Summary: The paper introduces a new quantum algorithm using weak measurement and partial negation to solve the quantum state discrimination problem. By counting the outcome of successive measurements on an auxiliary qubit, the algorithm can determine with high probability the state of an unknown qubit after measuring a single copy of it.

QUANTUM INFORMATION PROCESSING (2021)

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Article Physics, Multidisciplinary