19
collaborators
2026–2026
years active
Contributions
QIP QCrypt TQC talk poster presenter award · △program ◇steering ○organizing · filled = chair
2 Posters
| Title | Conference | Co-authors |
|---|---|---|
| Security Proof of a Novel Authentication Scheme for Quantum Key Distribution | QCRYPT 2026 | Claudia De Lazzari, Francesco Stocco, Edoardo Signorini, Giacomo Fregona, Fernando Chirici, Tommaso Occhipinti, Guglielmo Morgari, Alessandro Zavatta, Davide Bacco |
Quantum Key Distribution (QKD) protocols require Information‑Theoretically Secure (ITS) authentication of the classical channel to preserve the unconditional security of the distilled key. Standard ITS schemes are based on one-time keys: once a key is used to authenticate a message, it must be discarded. Since QKD requires mutual authentication, two independent one-time keys are typically consumed per round, imposing a non-trivial overhead on the net security key rate. In this work, we present the \emph{authentication-with-response} scheme, a novel ITS authentication scheme based on $\varepsilon$-Almost Strongly Universal\textsubscript{2} ($\varepsilon$-ASU\textsubscript{2}) functions, whose IT security can be established in the Universal Composability (UC) framework. The scheme achieves mutual authentication consuming a single one-time key per QKD round, halving key consumption compared to the state-of-the-art. |
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| Implementation and Validation of a Quantum-Secure Metropolitan Network in Real-World Scenario | QCRYPT 2026 | Claudia De Lazzari, Nicola Biagi, Marco Russo, Fernando Chirici, Francesco Stocco, Saverio Francesconi, Giacomo Ferranti, Alessandro Soureal, Antonella Sanguineti, Bartolomeo Montrucchio, Christian Laurenzi, Oliviero Testa, Guglielmo Morgari, Antonio Manzalini, Tommaso Occhipinti, Alessandro Zavatta, Davide Bacco |
The advent of cryptographically relevant quantum computers poses an existential threat to classical public-key infrastructure. Quantum Key Distribution (QKD) addresses this challenge by providing information-theoretic security for key establishment, independently of any computational hardness assumption. In this work, the deployment and experimental validation of a metropolitan-scale quantum-secure network between data centers in Milan is reported. The network operates over installed fiber infrastructure and implements a layered architecture integrating QKD hardware, standards-compliant Key Management (KM), and centralized Software-Defined Networking (SDN) orchestration. Dynamic path reconfiguration via active optical switching and trusted-node routing allow automated fail-over solutions. Application-layer validation across diverse protocols and workloads confirms the seamless interoperability of all system components. These results establish the technical and operational readiness of metropolitan QKD networks for production deployment, and offer a replicable blueprint for building quantum-secure communication infrastructure at metropolitan scale. |
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