Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Beyond the Limits of Shannon’s Information in Quantum Key Distribution

Version 1 : Received: 18 December 2020 / Approved: 21 December 2020 / Online: 21 December 2020 (12:10:10 CET)

A peer-reviewed article of this Preprint also exists.

Lizama-Pérez, L.A.; R., J.M.L.; Samperio, E.H. Beyond the Limits of Shannon’s Information in Quantum Key Distribution. Entropy 2021, 23, 229. Lizama-Pérez, L.A.; R., J.M.L.; Samperio, E.H. Beyond the Limits of Shannon’s Information in Quantum Key Distribution. Entropy 2021, 23, 229.

Journal reference: Entropy 2021, 23, 229
DOI: 10.3390/e23020229

Abstract

We present a new post-processing method for Quantum Key Distribution (QKD) that raise cubically the secret key rate in the number of double matching detection events. In Shannon’s communication model information is prepared at Alice’s side then it is intended to pass it over a noisy channel. In our approach, secret bits do not rely in Alice’s transmitted quantum bits but in Bob’s basis measurement choices. Therefore measured bits are publicly revealed while bases selections remain secret. Our method implements sifting, reconciliation and amplification in a unique process, it just require a round iteration, no redundancy bits are sent and there is no limit in the correctable error percentage. Moreover, this method can be implemented as a post processing software into QKD technologies already in use.

Subject Areas

QKD; distillation; amplification; reconciliation

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