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Quantum Cryptography Security

Finite-key security of passive quantum key distribution

arXiv
Authors: Víctor Zapatero, Marcos Curty

Year

2023

Paper ID

56082

Status

Preprint

Abstract Read

~2 min

Abstract Words

104

Citations

N/A

Abstract

The passive approach to quantum key distribution (QKD) consists of eliminating all optical modulators and random number generators from QKD systems, in so reaching an enhanced simplicity, immunity to modulator side channels, and potentially higher repetition rates. In this work, we provide finite-key security bounds for a fully passive decoy-state BB84 protocol, considering a passive QKD source recently presented. With our analysis, the attainable secret key rate is comparable to that of the perfect parameter estimation limit, in fact differing from the key rate of the active approach by less than one order of magnitude. This demonstrates the practicality of fully passive QKD solutions.

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  • The passive approach to quantum key distribution (QKD) consists of eliminating all optical modulators and random number generators from QKD systems, in so reaching an enhanced...

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References & Citation Signals

[1] DOI https://doi.org/arXiv:2308.02376 [2] arXiv https://arxiv.org/abs/2308.02376 [3] Publisher https://arxiv.org/abs/2308.02376

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