Please use this identifier to cite or link to this item: https://doi.org/10.1038/s41467-017-02307-4
Title: Practical device-independent quantum cryptography via entropy accumulation
Authors: Arnon-Friedman, R
Dupuis, F
Fawzi, O
Renner, R
Vidick, T 
Keywords: entropy
equipment
experimental study
quantum mechanics
theoretical study
article
entropy
theoretical study
Issue Date: 2018
Publisher: Nature Publishing Group
Citation: Arnon-Friedman, R, Dupuis, F, Fawzi, O, Renner, R, Vidick, T (2018). Practical device-independent quantum cryptography via entropy accumulation. Nature Communications 9 (1) : 459. ScholarBank@NUS Repository. https://doi.org/10.1038/s41467-017-02307-4
Rights: Attribution 4.0 International
Abstract: Device-independent cryptography goes beyond conventional quantum cryptography by providing security that holds independently of the quality of the underlying physical devices. Device-independent protocols are based on the quantum phenomena of non-locality and the violation of Bell inequalities. This high level of security could so far only be established under conditions which are not achievable experimentally. Here we present a property of entropy, termed "entropy accumulation", which asserts that the total amount of entropy of a large system is the sum of its parts. We use this property to prove the security of cryptographic protocols, including device-independent quantum key distribution, while achieving essentially optimal parameters. Recent experimental progress, which enabled loophole-free Bell tests, suggests that the achieved parameters are technologically accessible. Our work hence provides the theoretical groundwork for experimental demonstrations of device-independent cryptography. © 2018 The Author(s).
Source Title: Nature Communications
URI: https://scholarbank.nus.edu.sg/handle/10635/178461
ISSN: 2041-1723
DOI: 10.1038/s41467-017-02307-4
Rights: Attribution 4.0 International
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