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One of the most pressing issues in quantum key distribution (QKD) is the problem of detector side- channel attacks. To overcome this problem, researchers proposed an elegant "time-reversal" QKD protocol called measurement-device-independent…

We present a practical method that can make quantum key distribution (QKD), for the first time, both ultra-long-distance and immune to all attacks in the detection system. This method is an important extension of the…

Quantum Physics · Physics 2013-08-22 Feihu Xu , Bing Qi , Zhongfa Liao , Hoi-Kwong Lo

Mode-pairing quantum key distribution (MP-QKD) offers significant potential for long-distance secure communication, benefiting from its quadratic scaling capacity and phase compensation-free characteristic. However, MP-QKD still requires…

The security of measurement device-independent quantum key distribution (MDI QKD) relies on a thorough characterization of one's optical source output, especially any noise in the state preparation process. Here, we provide an extension of…

Quantum Physics · Physics 2021-01-04 J. Eli Bourassa , Ignatius William Primaatmaja , Charles Ci Wen Lim , Hoi-Kwong Lo

Reference-frame-independent measurement-device-independent quantum key distribution (RFI-MDI-QKD) is a novel protocol which eliminates all possible attacks on detector side and necessity of reference-frame alignment in source sides.…

Quantum Physics · Physics 2020-05-20 Feng-Yu Lu , Zhen-Qiang Yin , Guan-Jie Fan-Yuan , Rong Wang , Hang Liu , Shuang Wang , Wei Chen , De-Yong He

Two time-reversal quantum key distribution (QKD) schemes are the quantum entanglement based device-independent (DI)-QKD and measurement-device-independent (MDI)-QKD. The recently proposed twin field (TF)-QKD, also known as phase-matching…

Quantum Physics · Physics 2019-10-01 Wei Li , Le Wang , Shengmei Zhao

The device-independent approach to quantum key distribution (QKD) aims to establish a secret key between two or more parties with untrusted devices, potentially under full control of a quantum adversary. The performance of a QKD protocol…

Quantum Physics · Physics 2018-02-07 Timo Holz , Hermann Kampermann , Dagmar Bruß

Throughout history, every advance in encryption has been defeated by advances in hacking with severe consequences. Quantum cryptography holds the promise to end this battle by offering unconditional security when ideal single-photon sources…

We demonstrate that, with a fair comparison, the secret key rate of discrete-variable measurement-device-independent quantum key distribution (DV-MDI-QKD) with high-efficiency single-photon detectors and good system alignment is typically…

Quantum Physics · Physics 2015-12-01 Feihu Xu , Marcos Curty , Bing Qi , Li Qian , Hoi-Kwong Lo

Measurement-device-independent quantum key distribution (MDI-QKD) can eliminate detector side channels and prevent all attacks on detectors. The future of MDI-QKD is a quantum network that provides service to many users over untrusted relay…

Quantum Physics · Physics 2019-10-23 Wenyuan Wang , Feihu Xu , Hoi-Kwong Lo

Quantum Key Distribution (QKD) is a cutting-edge communication method that enables secure communication between two parties. Continuous-variable QKD (CV-QKD) is a promising approach to QKD that has several advantages over traditional…

Quantum Physics · Physics 2023-05-26 Andres Ruiz-Chamorro , Daniel Cano , Aida Garcia-Callejo , Veronica Fernandez

We analyze an entanglement-based quantum key distribution (QKD) architecture that uses a linear chain of quantum repeaters employing photon-pair sources, spectral-multiplexing, linear-optic Bell-state measurements, multi-mode quantum…

Measurement-device-independent quantum key distribution (MDI-QKD) is proved to be able to eliminate all potential detector side channel attacks. Combining with the reference frame independent (RFI) scheme, the complexity of practical system…

Quantum Physics · Physics 2018-11-12 Hongwei Liu , Jipeng Wang , Haiqiang Ma , Shihai Sun

Quantum Key Distribution (QKD) is considered the most immediate application to be widely implemented amongst a variety of potential quantum technologies. QKD enables sharing secret keys between distant users, using photons as information…

Quantum key distribution (QKD) allows two remote users to establish a secret key in the presence of an eavesdropper. The users share quantum states prepared in two mutually-unbiased bases: one to generate the key while the other monitors…

Quantum Physics · Physics 2018-05-03 Nurul T. Islam , Charles Ci Wen Lim , Clinton Cahall , Jungsang Kim , Daniel J. Gauthier

Measurement-device-independent quantum key distribution (MDI-QKD) can remove all detection side-channels from quantum communication systems. The security proofs require, however, that certain assumptions on the sources are satisfied. This…

Quantum Physics · Physics 2021-01-20 Weilong Wang , Kiyoshi Tamaki , Marcos Curty

It is known that measurement-device-independent quantum key distribution (MDI-QKD) provides ultimate security from all types of side-channel attack against detectors at the expense of low key generation rate. Here, we propose MDI-QKD using…

Quantum Physics · Physics 2017-03-08 Yonggi Jo , Wonmin Son

Continuous-variable quantum key distribution (CV QKD) with discrete modulation has attracted increasing attention due to its experimental simplicity, lower-cost implementation and compatibility with classical optical communication.…

Quantum Physics · Physics 2022-04-27 Zhi-Ping Liu , Min-Gang Zhou , Wen-Bo Liu , Chen-Long Li , Jie Gu , Hua-Lei Yin , Zeng-Bing Chen

The measurement-device-independent quantum key distribution (MDI-QKD) protocol has been proposed for the purpose of removing the detector side channel attacks. Due to the multi-photon events of coherent states sources, real-life…

Quantum Physics · Physics 2023-07-19 Mo Li , Chun-Mei Zhang , Zhen-Qiang Yin , Wei Chen , Shuang Wang , Guang-Can Guo , Zheng-Fu Han

In Measurement-Device-Independent Quantum Key Distribution (MDI-QKD), key rates are significantly reduced due to dispersion in asymmetric channels. This work addresses this issue by utilizing intensity and phase modulators for dispersion…

Quantum Physics · Physics 2024-11-19 Ishan Pandey , Gokul A , Varun Raghunathan
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