論文

査読有り
2011年3月

INFORMATION RECONCILIATION FOR QUANTUM KEY DISTRIBUTION

QUANTUM INFORMATION & COMPUTATION
  • David Elkouss
  • ,
  • Jesus Martinez-Mateo
  • ,
  • Vicente Martin

11
3-4
開始ページ
226
終了ページ
238
記述言語
英語
掲載種別
研究論文(学術雑誌)
出版者・発行元
RINTON PRESS, INC

Quantum key distribution (QKD) relies on quantum and classical procedures in order to achieve the growing of a secret random string the key known only to the two parties executing the protocol. Limited intrinsic efficiency of the protocol, imperfect devices and eavesdropping produce errors and information leakage from which the set of measured signals the raw key must be stripped in order to distill a final, information theoretically secure, key. The key distillation process is a classical one in which basis reconciliation, error correction and privacy amplification protocols are applied to the raw key. This cleaning process is known as information reconciliation and must be done in a fast and efficient way to avoid cramping the performance of the QKD system. Brassard and Salvail proposed a very simple and elegant protocol to reconcile keys in the secret-key agreement context., known as Cascade, that has become the de-facto standard for all QKD practical implementations. However, it is highly interactive, requiring many communications between the legitimate parties and its efficiency is not optimal, imposing an early limit to the maximum tolerable error rate. In this paper we describe a low-density parity-check reconciliation protocol that improves significantly on these problems. The protocol exhibits better efficiency and limits the number of uses of the communications channel. It is also able to adapt to different error rates while remaining efficient, thus reaching longer distances or higher secure key rate for a given QKD system.

リンク情報
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000286868100003&DestApp=WOS_CPL
URL
http://www.scopus.com/inward/record.url?eid=2-s2.0-78651409677&partnerID=MN8TOARS
URL
http://orcid.org/0000-0003-2023-2768
ID情報
  • ISSN : 1533-7146
  • ORCIDのPut Code : 16214806
  • SCOPUS ID : 78651409677
  • Web of Science ID : WOS:000286868100003

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