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Computing secure key rates for quantum cryptography with untrusted devices

Publikation: Beitrag in FachzeitschriftArtikelForschungPeer-Review

Autorschaft

  • Ernest Y.Z. Tan
  • René Schwonnek
  • Koon Tong Goh
  • Ignatius William Primaatmaja

Externe Organisationen

  • ETH Zürich
  • Universität Siegen
  • National University of Singapore

Details

OriginalspracheEnglisch
Aufsatznummer158
Fachzeitschriftnpj Quantum information
Jahrgang7
Ausgabenummer1
Frühes Online-Datum29 Okt. 2021
PublikationsstatusVeröffentlicht - Dez. 2021
Extern publiziertJa

Abstract

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 of DIQKD are now well understood, it remains a technical challenge to derive reliable and robust security bounds for advanced DIQKD protocols that go beyond the previous results based on violations of the CHSH inequality. In this work, we present a framework based on semidefinite programming that gives reliable lower bounds on the asymptotic secret key rate of any QKD protocol using untrusted devices. In particular, our method can in principle be utilized to find achievable secret key rates for any DIQKD protocol, based on the full input–output probability distribution or any choice of Bell inequality. Our method also extends to other DI cryptographic tasks.

ASJC Scopus Sachgebiete

Zitieren

Computing secure key rates for quantum cryptography with untrusted devices. / Tan, Ernest Y.Z.; Schwonnek, René; Goh, Koon Tong et al.
in: npj Quantum information, Jahrgang 7, Nr. 1, 158, 12.2021.

Publikation: Beitrag in FachzeitschriftArtikelForschungPeer-Review

Tan EYZ, Schwonnek R, Goh KT, Primaatmaja IW, Lim CCW. Computing secure key rates for quantum cryptography with untrusted devices. npj Quantum information. 2021 Dez;7(1):158. Epub 2021 Okt 29. doi: 10.1038/s41534-021-00494-z
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