Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

QKD Reconciliation System Using Conjugate Frames in the Presence of Near-Unity Error Rates

Version 1 : Received: 28 September 2022 / Approved: 30 September 2022 / Online: 30 September 2022 (11:03:56 CEST)

How to cite: Lizama-Perez, L.A.; Morán-Ramírez, J.I.; López-Romero, J.M. QKD Reconciliation System Using Conjugate Frames in the Presence of Near-Unity Error Rates. Preprints 2022, 2022090485. https://doi.org/10.20944/preprints202209.0485.v1 Lizama-Perez, L.A.; Morán-Ramírez, J.I.; López-Romero, J.M. QKD Reconciliation System Using Conjugate Frames in the Presence of Near-Unity Error Rates. Preprints 2022, 2022090485. https://doi.org/10.20944/preprints202209.0485.v1

Abstract

Previously, using the conjugate frame-based reconciliation approach, we defined a method to correct errors produced in pairs of non-orthogonal quantum states that are transmitted through a quantum key distribution (QKD) link. The security of the frame-based reconciliation was discussed in order to deal with Photon Number Division (PNS) attack and Intercept and Forward (IR) attack, among others. However, until the time of publication we did not have the distillation software to test our method. In this article, following the conjugate frame distillation method, we present the implementation of the post-processing system that demonstrates that it is capable of correcting errors in the presence of error rates close to unity. The system shows that when the number of double-sensing events at Bob's station is as low as 100, the number of secret bits stays above 4500 bits in about 12 seconds, giving a secret rate of 375 bits per second while that the channel error rate reaches 90\%.

Keywords

QKD; distillation; reconciliation; conjugate frame

Subject

Computer Science and Mathematics, Computational Mathematics

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