Device-independent quantum key distribution secure against collective attacks

By Stefano Pironio, Antonio Acín, Nicolas Brunner, Nicolas Gisin, Serge Massar, Valerio Scarani. 2009

563 citations recorded by the source corpus.

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 contrary to usual QKD, it does not rely on any assumptions about the internal working of the quantum devices used in the protocol. In this paper, we present in detail the security proof for a DIQKD protocol introduced in Acín et al (2008 Phys. Rev. Lett. 98 230501). This proof exploits the full structure of quantum theory (as opposed to other proofs that exploit only the no-signaling principle), but only holds against collective attacks, where the eavesdropper is assumed to act on the quantum systems of the honest parties independently and identically in each round of the protocol (although she can act coherently on her systems at any time). The security of any DIQKD protocol necessarily relies on the violation of a Bell inequality. We discuss the issue of loopholes in Bell experiments in this context.

Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics, Physiology

View Paper: https://www.semanticscholar.org/paper/685cddc04f2ed3ce8e22489628d0ea3c40a4447c

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Citations in the corpus

Robust self-testing of the singlet (2012, methodology): “(This assumption could be removed, for instance, using Azuma’s inequality as in [14].”
A Combinatorial Approach to Nonlocality and Contextuality (2012, background): “Since its discovery, it has found manifold applications in quantum information theory like [78,79].”
Advances in quantum cryptography (2019, unknown): “[163] S.”
Secure quantum key distribution with realistic devices (2020, background): “Its security was proven effective against collective attacks (Masanes et al., 2011; Pironio et al., 2009) [see also (Hänggi et al., 2010)] and later against general attacks (Arnon-Friedman et al., 2018; Vazirani and Vidick, 2014).”
A device-independent quantum key distribution system for distant users (2021, methodology): “Note that the improved performance of the QNL setup even allow for the implementation of the original DIQKD protocol [16, 34], which is more demanding than the considered protocol.”
Random numbers certified by Bell’s theorem (2009, unknown): “…exploited to construct a novel RNG where the violation of a Bell inequality guarantees that theoutputis random and private from any adversary, even in a device-independent scenario 12,13 where the internal workings of thetwo quantum devices are unknown or not trusted (Supplementary Information B).”
Fully device independent quantum key distribution (2012, background): “Other works [ABG + 07, PAB + 09, MRC + 09, HR10, MPA11] obtain better key rates under the stronger assumption that the eavesdropper is bound by the laws of quantum mechanics.”