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Quantum key distribution (QKD) provides secure keys resistant to code-breaking quantum computers. As headed towards commercial application, it is crucial to guarantee the practical security of QKD systems. However, the difficulty of…

量子物理 · 物理学 2018-05-14 Zhengyu Li , Yi-Chen Zhang , Hong Guo

The coherent one-way (COW) quantum key distribution (QKD) is a highly practical quantum communication protocol that is currently deployed in off-the-shelves products. However, despite its simplicity and widespread use, the security of…

量子物理 · 物理学 2022-12-26 Emilien Lavie , Charles C. -W. Lim

Device-independent quantum key distribution (DI-QKD) offers the strongest form of security against eavesdroppers bounded by the laws of quantum mechanics. However, a practical implementation is still pending due to the requirement of…

量子物理 · 物理学 2021-06-02 Junior R. Gonzales-Ureta , Ana Predojević , Adán Cabello

We provide an analysis of a new family of device independent quantum key distribution (QKD) protocols with several novel features: (a) The bits used for the secret key do not come from the results of the measurements on an entangled state…

量子物理 · 物理学 2015-12-09 Ramij Rahaman , Matthew G. Parker , Piotr Mironowicz , Marcin Pawłowski

Detector-device-independent quantum key distribution (ddiQKD) held the promise of being robust to detector side-channels, a major security loophole in QKD implementations. In contrast to what has been claimed, however, we demonstrate that…

量子物理 · 物理学 2016-12-21 Shihan Sajeed , Anqi Huang , Shihai Sun , Feihu Xu , Vadim Makarov , Marcos Curty

By testing nonlocality, the security of entanglement-based quantum key distribution (QKD) can be enhanced to being 'device-independent'. Here we ask whether such a strong form of security could also be established for one-way (prepare and…

量子物理 · 物理学 2011-07-18 Marcin Pawlowski , Nicolas Brunner

Device-Independent Quantum Key Distribution (DIQKD) is a formalism that supersedes traditional quantum key distribution, as its security does not rely on any detailed modelling of the internal working of the devices. This strong form of…

量子物理 · 物理学 2014-01-10 Stefano Pironio , Lluis Masanes , Anthony Leverrier , Antonio Acin

Device-independent quantum key distribution (DIQKD) is a key distribution scheme whose security is based on the laws of quantum physics but does not require any assumptions about the devices used in the protocol. The security of the…

量子物理 · 物理学 2024-01-18 Shih-Hsuan Chen , Chun-Hao Chang , Chih-Sung Chuu , Che-Ming Li

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…

量子物理 · 物理学 2021-01-20 Weilong Wang , Kiyoshi Tamaki , Marcos Curty

Device-independent quantum key distribution (DIQKD) generates a secret key among two parties in a provably secure way without making assumptions about the internal working of the devices used in the protocol. The main challenge for a DIQKD…

量子物理 · 物理学 2016-10-31 Alejandro Máttar , Antonio Acín

Quantum key distribution (QKD) serves as a cornerstone of secure quantum communication, providing unconditional security grounded in quantum mechanics. While trusted-node networks have facilitated early QKD deployment, their vulnerability…

量子物理 · 物理学 2025-03-10 Jingyang Liu , Xingyu Zhou , Huajian Ding , Jiaxin Xu , Chunhui Zhang , Jian Li , Qin Wang

Although quantum key distribution (QKD) is theoretically secure, there is a gap between the theory and practice. In fact, real-life QKD may not be secure because component devices in QKD systems may deviate from the theoretical models…

Multipartite device-independent quantum key distribution (DI-QKD), also known as device-independent conference key agreement, enables more than two remote parties to share a common key with information-theoretic security even without…

量子物理 · 物理学 2026-03-03 Makoto Ishihara , Wojciech Roga , Masahiro Takeoka

Device independent quantum key distribution aims to provide a higher degree of security than traditional QKD schemes by reducing the number of assumptions that need to be made about the physical devices used. The previous proof of security…

量子物理 · 物理学 2009-10-26 Matthew McKague

Quantum key distribution (QKD) is a method that distributes a secret key to a sender and a receiver by the transmission of quantum particles (e.g. photons). Device-independent quantum key distribution (DIQKD) is a version of QKD with a…

量子物理 · 物理学 2021-04-27 Matthias Christandl , Roberto Ferrara , Karol Horodecki

In the ever-evolving landscape of quantum cryptography, Device-independent Quantum Key Distribution (DI-QKD) stands out for its unique approach to ensuring security based not on the trustworthiness of the devices but on nonlocal…

Quantum key distribution(QKD) allows the legitimate partner to establish a secret key whose security only depends on physical laws. In recent years, research on QKD by employing insecure measurement devices, namely…

量子物理 · 物理学 2023-07-04 Hao Shu

Quantum key distribution (QKD) can provide unconditional secure communication between two distant parties. Although the significance of QKD is undisputed, its feasibility has been questioned because of certain limitations in the practical…

Advances in quantum computing are a rapidly growing threat towards modern cryptography. Quantum key distribution (QKD) provides long-term security without assuming the computational power of an adversary. However, inconsistencies between…

量子物理 · 物理学 2019-01-18 Henry Semenenko , Philip Sibson , Mark G. Thompson , Chris Erven

To prove the security of quantum key distribution (QKD) protocols, several assumptions have to be imposed on users' devices. From an experimental point of view, it is preferable that such theoretical requirements are feasible and the number…

量子物理 · 物理学 2023-02-07 Akihiro Mizutani