Security proof for parallel DIQKD
Fuente:
arXiv
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| Autori principali: | , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866911039766921216 |
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| author | Marwah, Ashutosh Dupuis, Frédéric |
| author_facet | Marwah, Ashutosh Dupuis, Frédéric |
| contents | We present a parallel device independent quantum key distribution (DIQKD) protocol based on the CHSH game and prove its security. Using techniques developed for analysing the parallel repetition of anchored non-local games, we show that the answers on a small random linear subset of the games in the DIQKD protocol can be simulated as the output of a single-round strategy for playing the CHSH game. Then, we use the recently developed unstructured approximate entropy accumulation theorem to establish the smooth min-entropy lower bound required for the security proof. Our approach yields a more information-theoretic and general proof for parallel DIQKD compared to previous proofs. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_03991 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Security proof for parallel DIQKD Marwah, Ashutosh Dupuis, Frédéric Quantum Physics Information Theory We present a parallel device independent quantum key distribution (DIQKD) protocol based on the CHSH game and prove its security. Using techniques developed for analysing the parallel repetition of anchored non-local games, we show that the answers on a small random linear subset of the games in the DIQKD protocol can be simulated as the output of a single-round strategy for playing the CHSH game. Then, we use the recently developed unstructured approximate entropy accumulation theorem to establish the smooth min-entropy lower bound required for the security proof. Our approach yields a more information-theoretic and general proof for parallel DIQKD compared to previous proofs. |
| title | Security proof for parallel DIQKD |
| topic | Quantum Physics Information Theory |
| url | https://arxiv.org/abs/2507.03991 |