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MULTISS: un protocole de stockage confidentiel {\`a} long terme sur plusieurs r{\'e}seaux QKD
Thomas Pr\'evost (I3S), Olivier Alibart (INPHYNI), Marc Kaplan, Anne Marin
https://arxiv.org/abs/2506.04800

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