MULTISS: un protocole de stockage confidentiel {à} long terme sur plusieurs r{é}seaux QKD

Fuente: arXiv
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Auteurs principaux: Prévost, Thomas, Alibart, Olivier, Kaplan, Marc, Marin, Anne
Format: Preprint
Publié: 2025
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author Prévost, Thomas
Alibart, Olivier
Kaplan, Marc
Marin, Anne
author_facet Prévost, Thomas
Alibart, Olivier
Kaplan, Marc
Marin, Anne
contents This paper presents MULTISS, a new protocol for long-term storage distributed across multiple Quantum Key Distribution (QKD) networks. This protocol is an extension of LINCOS, a secure storage protocol that uses Shamir secret sharing for secret storage on a single QKD network. Our protocol uses hierarchical secret sharing to distribute a secret across multiple QKD networks while ensuring perfect security. Our protocol further allows for sharing updates without having to reconstruct the entire secret. We also prove that MULTISS is strictly more secure than LINCOS, which remains vulnerable when its QKD network is compromised.
format Preprint
id arxiv_https___arxiv_org_abs_2506_04800
institution arXiv
publishDate 2025
record_format arxiv
spellingShingle MULTISS: un protocole de stockage confidentiel {à} long terme sur plusieurs r{é}seaux QKD
Prévost, Thomas
Alibart, Olivier
Kaplan, Marc
Marin, Anne
Cryptography and Security
This paper presents MULTISS, a new protocol for long-term storage distributed across multiple Quantum Key Distribution (QKD) networks. This protocol is an extension of LINCOS, a secure storage protocol that uses Shamir secret sharing for secret storage on a single QKD network. Our protocol uses hierarchical secret sharing to distribute a secret across multiple QKD networks while ensuring perfect security. Our protocol further allows for sharing updates without having to reconstruct the entire secret. We also prove that MULTISS is strictly more secure than LINCOS, which remains vulnerable when its QKD network is compromised.
title MULTISS: un protocole de stockage confidentiel {à} long terme sur plusieurs r{é}seaux QKD
topic Cryptography and Security
url https://arxiv.org/abs/2506.04800