Quantum Advantage for Two-Party Differential Privacy

Name: Quantum Advantage for Two-Party Differential Privacy
Uploaded: 2026-10-06T18:14:15.980973+00:00
Duration: 586 s
Description: Quantum communication allows two parties to estimate a shared Hamming distance with an expected error of O(1) under Klauck’s honest, nonpreemptive model. This beats classical information-theoretic protocols which require an error of $\Omega(\sqrt{n})$. The result shows that quantum communication provides a genuine same-model separation from classical privacy bounds.

Quantum communication allows two parties to estimate a shared Hamming distance with an expected error of O(1) under Klauck’s honest, nonpreemptive model. This beats classical information-theoretic protocols which require an error of $\Omega(\sqrt{n})$. The result shows that quantum communication provides a genuine same-model separation from classical privacy bounds.

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