Experimental measurement-device-independent type quantum key distribution with flawed and correlated sources

Gu, Jie; Cao, Xiaoyu; Fu, Y.; He, Zhiyuan; Yin, Zejie; Yin, Hua-Lei; Chen, Zeng-Bing

doi:10.1016/j.scib.2022.10.010

Cited by 86 publications

(47 citation statements)

References 65 publications

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“…However, the appearance of Shor’s algorithm [ 7 ] and Grover’s algorithm [ 8 ] threatened the security of classical cryptography protocols based on difficult mathematical problems. To cope with this problem, people considered using the principles of quantum mechanics in cryptography protocols, which led to the birth of various interesting research fields, such as quantum key distribution (QKD) [ 9 , 10 , 11 , 12 ], quantum secret sharing (QSS) [ 13 , 14 ] and, the area of research in which this article is based, secure multi-party quantum computation (SMQC). Of these, the QKD field has made many notable advances.…”

Section: Introductionmentioning

confidence: 99%

Quantum Secure Multi-Party Summation Using Single Photons

Xie

2023

Entropy

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In this paper, we propose a secure multi-party summation based on single photons. With the help of a semi-honest third party, n participants can simultaneously obtain the summation result without revealing their secret inputs. Our protocol uses single photon states as the information carriers. In addition, each participant with secret input only performs simple single-particle operators rather than particle preparation and any complex quantum measurements. These features make our protocol more feasible to implement. We demonstrate the correctness and security of the proposed protocol, which is resistant to participant attack and outside attack. In the end, we compare in detail the performance of the quantum summation protocol in this paper with other schemes in terms of different indicators. By comparison, our protocol is efficient and easy to implement.

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Section: Introductionmentioning

confidence: 99%

Quantum Secure Multi-Party Summation Using Single Photons

Xie

2023

Entropy

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“…To date, almost all quantum communication protocols such as QKD [44][45][46][47][48][49][50][51][52][53][54], QSS [55,56] and quantum conference key agreement [55,57] aim at generating quantum keys with perfect secrecy and correctness. Thereafter, these keys are then used to finish the corresponding cryptographic tasks such as private communication, secret sharing and group encryption.…”

Section: Introductionmentioning

confidence: 99%

One-Time Universal Hashing Quantum Digital Signatures without Perfect Keys

Li¹,

Xie²,

Cao³

et al. 2023

Preprint

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Quantum digital signatures (QDS), generating correlated bit strings among three remote parties for signatures through quantum law, can guarantee non-repudiation, authenticity, and integrity of messages. Recently, one-time universal hashing QDS framework, exploiting the quantum asymmetric encryption and universal hash functions, has been proposed to significantly improve the signature rate and ensure unconditional security by directly signing the hash value of long messages. However, similar to quantum key distribution, this framework utilizes keys with perfect secrecy by performing privacy amplification that introduces cumbersome matrix operations, thereby consuming large computational resources, causing delays and increasing failure probability. Here, we prove that, different from private communication, imperfect quantum keys with limited information leakage can be used for digital signatures and authentication without compromising the security while having eight orders of magnitude improvement on signature rate for signing a megabit message compared with conventional single-bit schemes. This study significantly reduces the delay for data postprocessing and is compatible with any quantum key generation protocols. In our simulation, taking two-photon twin-field key generation protocol as an example, QDS can be practically implemented over a fiber distance of 650 km between the signer and receiver. For the first time, this study offers a cryptographic application of quantum keys with imperfect secrecy and paves a way for the practical and agile implementation of digital signatures in a future quantum network.

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“…Moreover, users in a MDI-QKD network can share expensive detectors, and the topology of MDI-QKD is naturally suitable for deployment in star-type networks. Additionally, side-channel-secure QKD has recently been experimentally realized, which is not only MDI but also immune to potential source imperfections [35,36]. However, the key rates of most forms of QKD are fundamentally bounded by the secret key capacity of repeaterless QKD [37][38][39][40] due to photon loss in the channel.…”

Section: Introductionmentioning

confidence: 99%

Advantages of Asynchronous Measurement-Device-Independent Quantum Key Distribution in Intercity Networks

Xie¹,

Bai²,

Lu³

et al. 2023

Preprint

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The new variant of measurement-device-independent quantum key distribution (MDI-QKD), asynchronous MDI-QKD, offers similar repeater-like rate-loss scaling but has the advantage of simple technology implementation by exploiting an innovative post-measurement pairing technique. We herein present an evaluation of the practical aspects of decoy-state asynchronous MDI-QKD. To determine its effectiveness, we analyze the optimal method of decoy-state calculation and examine the impact of asymmetrical channels and multi-user networks. Our simulations show that, under realistic conditions, aynchronous MDI-QKD can furnish the highest key rate with MDI security as compared to other QKD protocols over distances ranging from 50 km to 480 km. At fiber distances of 50 km and 100 km, the key rates attain 6.02 Mbps and 2.29 Mbps respectively, which are sufficient to facilitate real-time one-time-pad video encryption. Our findings indicate that experimental implementation of asynchronous MDI-QKD in intercity networks can be both practical and efficient.

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Experimental measurement-device-independent type quantum key distribution with flawed and correlated sources

Cited by 86 publications

References 65 publications

Quantum Secure Multi-Party Summation Using Single Photons

Quantum Secure Multi-Party Summation Using Single Photons

One-Time Universal Hashing Quantum Digital Signatures without Perfect Keys

Advantages of Asynchronous Measurement-Device-Independent Quantum Key Distribution in Intercity Networks

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