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| Auteurs principaux: | , , , |
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| Format: | Preprint |
| Publié: |
2026
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| Sujets: | |
| Accès en ligne: | https://arxiv.org/abs/2605.04650 |
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| _version_ | 1866914534212501504 |
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| author | Laurent-Puig, Nicolas Doosti, Mina Innocenzi, Adriano Diamanti, Eleni |
| author_facet | Laurent-Puig, Nicolas Doosti, Mina Innocenzi, Adriano Diamanti, Eleni |
| contents | Quantum Key Distribution (QKD) enables Information-Theoretically Secure (ITS) key exchange, robust even against future quantum computing threats. However, a fundamental limitation of QKD is the requirement for an authenticated classical channel, which necessitates a pre-shared secret key. In this work, we address this challenge by adopting a Hybrid Entangled Physical Unclonable Function (PUF) protocol for authentication. We demonstrate that this PUF-based method generates an ITS initial key under minimal explicit hardware assumptions. This approach allows us to experimentally perform a fully ITS-authenticated entanglement-based QKD protocol that relies solely on such assumptions, effectively eliminating the need for pre-shared secrets. This represents a significant step towards the practical realization of quantum network protocols using lightweight, readily available hardware assumptions, without weakening security guarantees. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_04650 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Unconditional Authentication in Quantum Key Distribution via Hybrid Entangled Physical Unclonable Functions Laurent-Puig, Nicolas Doosti, Mina Innocenzi, Adriano Diamanti, Eleni Quantum Physics Quantum Key Distribution (QKD) enables Information-Theoretically Secure (ITS) key exchange, robust even against future quantum computing threats. However, a fundamental limitation of QKD is the requirement for an authenticated classical channel, which necessitates a pre-shared secret key. In this work, we address this challenge by adopting a Hybrid Entangled Physical Unclonable Function (PUF) protocol for authentication. We demonstrate that this PUF-based method generates an ITS initial key under minimal explicit hardware assumptions. This approach allows us to experimentally perform a fully ITS-authenticated entanglement-based QKD protocol that relies solely on such assumptions, effectively eliminating the need for pre-shared secrets. This represents a significant step towards the practical realization of quantum network protocols using lightweight, readily available hardware assumptions, without weakening security guarantees. |
| title | Unconditional Authentication in Quantum Key Distribution via Hybrid Entangled Physical Unclonable Functions |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2605.04650 |