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Quantum key reconciliation for satellite-based communications

Quantum key reconciliation for satellite-based communications
Quantum key reconciliation for satellite-based communications

Quantum Key Distribution (QKD) has been regarded as a novel approach to establish a secure communication between two legitimate partners. With the recent success of space based experimental QKD systems, researchers are now focussing on implementing more practical and efficient QKD systems that meet the challenges faced in space-based implementations. One pressing problem is the need for efficient and easy to implement reconciliation schemes for practical QKD systems. Rate-adaptive schemes based on LDPC codes constitute an appealing implementation of the key reconciliation process since they cover the entire range of the channel parameter space with a limited set of pre-defined Mother codes. In this paper, we investigate in detail some rate- adaptive reconciliation schemes based on LDPC codes, illustrating how their performance compares to other set-ups in which fixed-rate non- adaptive LDPC codes optimised for different channel conditions are adopted. In particular, the impact rate-adaptive codes have on decoding complexity, and subsequently the overall secure key throughput, is quantified through full blown simulations of an entanglement-based version of the QKD protocol within the context of an entanglement source onboard a satellite. Our work highlights that even though rate adaptive schemes schemes for QKD reconciliation appear ideal for future space-based implementations of single- photon QKD, identification of ideal Mother codes for such schemes remains to be resolved.

Institute of Electrical and Electronics Engineers Inc.
Ai, Xiaoyu
c1a0ee8b-7103-4930-9880-964e8f496c22
Malaney, Robert
4eb35db5-d7f6-4122-9b9f-08cbf877c1a9
Ng, Soon Xin
e19a63b0-0f12-4591-ab5f-554820d5f78c
Ai, Xiaoyu
c1a0ee8b-7103-4930-9880-964e8f496c22
Malaney, Robert
4eb35db5-d7f6-4122-9b9f-08cbf877c1a9
Ng, Soon Xin
e19a63b0-0f12-4591-ab5f-554820d5f78c

Ai, Xiaoyu, Malaney, Robert and Ng, Soon Xin (2019) Quantum key reconciliation for satellite-based communications. In 2018 IEEE Global Communications Conference, GLOBECOM 2018 - Proceedings. Institute of Electrical and Electronics Engineers Inc.. (doi:10.1109/GLOCOM.2018.8647658).

Record type: Conference or Workshop Item (Paper)

Abstract

Quantum Key Distribution (QKD) has been regarded as a novel approach to establish a secure communication between two legitimate partners. With the recent success of space based experimental QKD systems, researchers are now focussing on implementing more practical and efficient QKD systems that meet the challenges faced in space-based implementations. One pressing problem is the need for efficient and easy to implement reconciliation schemes for practical QKD systems. Rate-adaptive schemes based on LDPC codes constitute an appealing implementation of the key reconciliation process since they cover the entire range of the channel parameter space with a limited set of pre-defined Mother codes. In this paper, we investigate in detail some rate- adaptive reconciliation schemes based on LDPC codes, illustrating how their performance compares to other set-ups in which fixed-rate non- adaptive LDPC codes optimised for different channel conditions are adopted. In particular, the impact rate-adaptive codes have on decoding complexity, and subsequently the overall secure key throughput, is quantified through full blown simulations of an entanglement-based version of the QKD protocol within the context of an entanglement source onboard a satellite. Our work highlights that even though rate adaptive schemes schemes for QKD reconciliation appear ideal for future space-based implementations of single- photon QKD, identification of ideal Mother codes for such schemes remains to be resolved.

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More information

Published date: 20 February 2019
Venue - Dates: 2018 IEEE Global Communications Conference, GLOBECOM 2018, United Arab Emirates, 2018-12-09 - 2018-12-13

Identifiers

Local EPrints ID: 430062
URI: http://eprints.soton.ac.uk/id/eprint/430062
PURE UUID: c2a422f0-cdbd-4acf-8993-aaa0a48dcd12
ORCID for Soon Xin Ng: ORCID iD orcid.org/0000-0002-0930-7194

Catalogue record

Date deposited: 11 Apr 2019 16:30
Last modified: 18 Feb 2021 16:50

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Contributors

Author: Xiaoyu Ai
Author: Robert Malaney
Author: Soon Xin Ng ORCID iD

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