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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…

Quantum Physics · Physics 2021-06-02 Junior R. Gonzales-Ureta , Ana Predojević , Adán Cabello

The measurement-device-independent quantum key distribution (MDI-QKD) protocol is proposed to remove the detector side channel attacks, while its security relies on the assumption that the encoding systems are perfectly characterized. In…

In the implementation of device-independent quantum key distribution we are interested in maximizing the key rate, i.e. the number of key bits that can be obtained per signal, for a fixed security parameter. In the finite size regime, we…

Quantum Physics · Physics 2019-07-25 Gláucia Murta , Suzanne B. van Dam , Jérémy Ribeiro , Ronald Hanson , Stephanie Wehner

Device-independent quantum key distribution (DIQKD) aims to achieve secure key distribution with only minimal assumptions, by basing its security on the violation of Bell inequalities. While this offers strong security guarantees, it comes…

Quantum Physics · Physics 2024-05-28 Ernest Y. -Z. Tan

Photon losses are the main obstacle to fully photonic implementations of device-independent quantum key distribution (DIQKD). Motivated by recent work showing that routed Bell scenarios offer increased robustness to detection inefficiencies…

Quantum Physics · Physics 2025-05-02 Tristan Le Roy-Deloison , Edwin Peter Lobo , Jef Pauwels , Stefano Pironio

Device-independent quantum key distribution (DIQKD) exploits the violation of a Bell inequality to extract secure key even if the users' devices are untrusted. Currently, all DIQKD protocols suffer from the secret key capacity bound, i.e.,…

Quantum Physics · Physics 2021-04-05 Yuan-Mei Xie , Bing-Hong Li , Yu-Shuo Lu , Xiao-Yu Cao , Wen-Bo Liu , Hua-Lei Yin , Zeng-Bing Chen

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…

Quantum Physics · Physics 2024-01-18 Shih-Hsuan Chen , Chun-Hao Chang , Chih-Sung Chuu , Che-Ming Li

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…

Quantum Physics · Physics 2021-04-27 Matthias Christandl , Roberto Ferrara , Karol Horodecki

Device-independent quantum key distribution (DIQKD) allows two distant parties to establish a secret key, based only on the observed Bell nonlocal distribution. It remains however, unclear what the minimal resources for enabling DIQKD are…

Quantum Physics · Physics 2026-01-05 Bora Ulu , Nicolas Brunner , Mirjam Weilenmann

Device-independent quantum key distribution (DIQKD) is one of the most challenging tasks in quantum cryptography. The protocols and their security are based on the existence of Bell inequalities and the ability to violate them by measuring…

Quantum Physics · Physics 2025-06-09 Rotem Arnon , Felix Leditzky

Device-independent quantum key distribution (DI-QKD) enables information-theoretically secure key exchange between remote parties without any assumptions on the internal workings of the devices used for its implementation. However, its…

Quantum Physics · Physics 2025-11-20 Makoto Ishihara , Anthony Brendan , Wojciech Roga , Ulrik L. Andersen , Masahiro Takeoka

Device-Independent Quantum Key Distribution (DIQKD) aims to generate secret keys between two parties without relying on trust in their employed devices, imposing strict noise constraints for key generation. This study explores the…

Quantum Physics · Physics 2024-02-02 Javier Rivera-Dean , Anna Steffinlongo , Neil Parker-Sánchez , Antonio Acín , Enky Oudot

Device-independent quantum key distribution (DIQKD) guarantees unconditional security of secret key without making assumptions about the internal workings of the devices used. It does so using the loophole-free violation of a Bell's…

Quantum Physics · Physics 2016-05-04 Kaushik P. Seshadreesan , Masahiro Takeoka , Masahide Sasaki

We propose two quantum key distribution (QKD) protocols based on Bell's inequality, which can be considered as modified time-reversed E91 protocol. Similar to the measurement-device-independent quantum key distribution (MDI-QKD) protocol,…

Quantum Physics · Physics 2014-07-29 Hua-Lei Yin , Yao Fu , Yan-Lin Tang , Yuan Li , Teng-Yun Chen , Zeng-Bing Chen

Device-independent quantum key distribution (DI-QKD) leverages nonlocal correlations to establish cryptographic keys between two honest parties while making minimal assumptions about the underlying systems. The security of DI-QKD is…

Quantum Physics · Physics 2026-05-20 Pritam Roy , Souradeep Sasmal , Subhankar Bera , Shashank Gupta , Arup Roy , A. S. Majumdar

In device-independent quantum key distribution (DIQKD), an adversary prepares a device consisting of two components, distributed to Alice and Bob, who use the device to generate a secure key. The security of existing DIQKD schemes holds…

Quantum Physics · Physics 2022-08-01 Tony Metger , Yfke Dulek , Andrea Coladangelo , Rotem Arnon-Friedman

Device-independent quantum key distribution (DIQKD) provides the strongest form of secure key exchange, using only the input-output statistics of the devices to achieve information-theoretic security. Although the basic security principles…

Transmission loss represents a major obstacle to the device-independent certification of quantum correlations over long distances, limiting applications such as device-independent quantum key distribution (DIQKD). In this work, we…

Quantum Physics · Physics 2025-06-30 Pavel Sekatski , Jef Pauwels , Edwin Peter Lobo , Stefano Pironio , Nicolas Brunner

Recently there were many proposals on device-independent (DI) quantum key distribution protocol whose security is based on the violation of the Clauser-Horne-Shimony-Holt inequality. However, as a statistical law, a certain extent of…

Quantum Physics · Physics 2013-08-12 Guang Ping He

Measurement-device-independent quantum key distribution (MDI-QKD) protocol was proposed to remove all the detector side channel attacks, while its security relies on the trusted encoding systems. Here we propose a one-sided MDI-QKD…

Quantum Physics · Physics 2018-01-18 Wen-Fei Cao , Yi-Zheng Zhen , Yu-Lin Zheng , Li Li , Zeng-Bing Chen , Nai-Le Liu , Kai Chen