Agile and Versatile Quantum Communication: Signatures and Secrets

Richter, Stefan; Thornton, Matthew; Khan, Imran; Scott, Hamish; Jaksch, Kevin; Vogl, Ulrich; Stiller, Birgit; Leuchs, Gerd; Marquardt, Christoph; Korolkova, Natalia

doi:10.1103/physrevx.11.011038

Cited by 18 publications

(7 citation statements)

References 30 publications

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“…In principle, wavelength multiplexing could be leveraged to combine all signals into a single fiber, although further research on crosstalk effects and mitigation will be required to ensure performance is maintained. As an additional way to reduce the resource burden of traditional pair-wise QKD connections between all network users, quantum secret sharing (QSS) techniques [43][44][45][46][47] based on a full-mesh topology could be considered in lieu of dedicated point-to-point QKD systems for securing future QLANs.…”

Section: Discussionmentioning

confidence: 99%

Advanced Architectures for High-Performance Quantum Networking

Alshowkan,

Evans,

Williams

et al. 2021

Preprint

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has been co-authored by UT-Battelle, LLC, under contract DE-AC05-00OR22725 with the US Department of Energy (DOE). The US government retains and the publisher, by accepting the article for publication, acknowledges that the US government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for US government purposes. DOE will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doe-public-access-plan).

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Section: Discussionmentioning

confidence: 99%

Advanced Architectures for High-Performance Quantum Networking

Alshowkan,

Evans,

Williams

et al. 2021

Preprint

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“…In 1984, Charles Bennett and Giller Brassard invented BB84 protocol. [12] Because the BB84 protocol can effectively detect eavesdropping and shut down communication, or redistribute the key until no one eavesdrops, the one-time cipher book assigned to A and B becomes an "unbreakable" encryption method that can encrypt classical communication and thus achieve completely secret encrypted communication.…”

Section: Approaches For Qcmentioning

confidence: 99%

The Progress of Quantum Communication

Tang¹

2022

AJST

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In view of the pursuit of increasing the capacity of channels and confidential communication, quantum communication has been developed in recent years. No-Cloning Theorem signifies that bugging can be identified during quantum communication. BB84 protocol provides the changed emissive photon to the receiver and the difference of signals would appear if there has any eavesdropper, due to quantum cannot be copied but intercepted and random selection of measuring modes by the eavesdropper. Although quantum communication still has room for growth, significant advantages of this technique make it a great candidate for future communication methods.

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“…In this work, we propose a strict QBA protocol that exploits the recursion method [37] and quantum digital signatures (QDS) [38][39][40][41][42][43][44][45][46][47][48][49][50][51] to address the limitation of the fault-tolerance bound and security loopholes, which exploits the nonrepudiation and unforgeability of the delivered messages and thus ensures consistency. We also compare our Here, we provide an example of a multicast round including n players with primary S. The forwarder is chosen from among the backups, and the other unchosen backups act as verifiers.…”

Section: Introductionmentioning

confidence: 99%

Beating the fault-tolerance bound and security loopholes for Byzantine agreement with a quantum solution

Weng¹,

Gao²,

Yu³

et al. 2022

Preprint

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Byzantine agreement, the underlying core of blockchain, aims to make every node in a decentralized network reach consensus. However, the classical Byzantine agreement faces two major problems. One is the 1/3 fault-tolerance bound, which means the system to tolerate f malicious nodes requires at least 3f + 1 nodes. The other problem is the security loopholes of its classical cryptography methods. Here, we propose a quantum Byzantine agreement that exploits the recursion method and quantum digital signatures to break this bound with nearly 1/2 fault-tolerance and provides unconditional security. The consistency check between each pair of rounds ensures the unforgeability and nonrepudiation throughout the whole process. Our protocol is highly practical for its ability to transmit arbitrarily long messages and mature techniques. For the first time, we experimentally demonstrate three-party and five-party quantum consensus for a digital ledger. Our work suggests an important avenue for quantum blockchain and quantum consensus networks.

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Agile and Versatile Quantum Communication: Signatures and Secrets

Cited by 18 publications

References 30 publications

Advanced Architectures for High-Performance Quantum Networking

Advanced Architectures for High-Performance Quantum Networking

The Progress of Quantum Communication

Beating the fault-tolerance bound and security loopholes for Byzantine agreement with a quantum solution

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