Comment on "Fully device-independent conference key agreement" [Phys. Rev. A 97, 022307 (2018)]
arXiv:1906.01710 · doi:10.1103/PhysRevA.100.026301
Abstract
In this manuscript we discuss the device-independent conference key agreement (DICKA) protocol [Phys. Rev. A 97, 022307 (2018)]. We show that the suggested honest implementation fails, because perfect correlated measurement results and the required Bell-inequality violation cannot be achieved simultaneously, in contradiction to what is claimed. We further show via semidefinite programming that there cannot exist any suitable honest implementation in the tripartite setting, rendering the DICKA protocol incomplete.
arXiv commentComment, 3 pages
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Cited by in corpus (8)
- Quantum Conference Key Agreement: A Review
- Experimental quantum conference key agreement
- A Genuine Multipartite Bell Inequality for Device-independent Conference Key Agreement
- Entropy bounds for multiparty device-independent cryptography
- Boosting device-independent cryptography with tripartite nonlocality
- Genuine multipartite entanglement is not a precondition for secure conference key agreement
- Genuine multipartite entanglement is not necessary for standard device-independent conference key agreement
- Long-Distance Device-Independent Conference Key Agreement