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Device-independent quantum key distribution (DIQKD) is the art of using untrusted devices to distribute secret keys in an insecure network. It thus represents the ultimate form of cryptography, offering not only information-theoretic…

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

Device-independent quantum key distribution (DIQKD) represents a relaxation of the security assumptions made in usual quantum key distribution (QKD). As in usual QKD, the security of DIQKD follows from the laws of quantum physics, but…

Quantum Physics · Physics 2009-04-30 Stefano Pironio , Antonio Acin , Nicolas Brunner , Nicolas Gisin , Serge Massar , Valerio Scarani

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

Quantum Key Distribution (QKD) is based on the laws of quantum mechanics to enable provably secure communication. Despite its theoretical security promise, practical QKD systems are vulnerable to serious attacks, including side-channel…

Quantum Physics · Physics 2025-05-21 Syed M. Arslan , Saif Al-Kuwari , M. T. Rahim , Hashir Kuniyal

Device-independent quantum key distribution (DIQKD) is the art of using untrusted devices to establish secret keys over an untrusted channel. So far, the real-world implementation of DIQKD remains a major challenge, as it requires the…

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) 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…

Quantum Physics · Physics 2016-10-31 Alejandro Máttar , Antonio Acín

In device-independent quantum key distribution (DIQKD) the security is not based on any assumptions about the intrinsic properties of the devices and the quantum signals, but on the violation of a Bell inequality. We introduce a DIQKD…

Quantum Physics · Physics 2022-04-13 Sarnava Datta , Hermann Kampermann , Dagmar Bruß

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 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…

Quantum Physics · Physics 2014-01-10 Stefano Pironio , Lluis Masanes , Anthony Leverrier , Antonio Acin

Device-independent quantum key distribution (DI-QKD) provides the gold standard for secure key exchange. Not only it allows for information-theoretic security based on quantum mechanics, but it relaxes the need to physically model the…

Device-independent quantum key distribution (DIQKD) promises cryptographic security based solely on observed quantum correlations, yet its implementation over long distances remains limited. Routed Bell tests have recently re-emerged as a…

Quantum Physics · Physics 2026-03-04 Gereon Koßmann , Mario Berta , René Schwonnek

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 (DI-QKD) is often seen as the ultimate key exchange protocol in terms of security, as it can be performed securely with uncharacterised black-box devices. The advent of DI-QKD closes several…

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 (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

Quantum key distribution (QKD) is a provably secure way for two distant parties to establish a common secret key, which then can be used in a classical cryptographic scheme. Using quantum entanglement, one can reduce the necessary…

Quantum Physics · Physics 2016-08-10 E. A. Aguilar , R. Ramanathan , J. Kofler , M. Pawlowski

Device-independent quantum key distribution (DIQKD) provides the strongest form of quantum security, as it allows two honest users to establish secure communication channels even when using fully uncharacterized quantum devices. The…

Quantum Physics · Physics 2025-08-06 Anna Steffinlongo , Mariana Navarro , Marina Cenni , Xavier Valcarce , Antonio Acín , Enky Oudot

Device-independent quantum key distribution (DIQKD) allows two users to set up shared cryptographic key without the need to trust the quantum devices used. Doing so requires nonlocal correlations between the users. However, in [Phys. Rev.…

Quantum Physics · Physics 2024-05-27 Lewis Wooltorton , Peter Brown , Roger Colbeck
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