Coherent attacks are stronger than collective attacks on DIQKD with random postselection
Quantum Physics
2023-06-14 v1
Abstract
In a recent paper [Phys. Rev. Lett. 129, 050502 (2022)], the authors report on the implementation of a device-independent QKD protocol with random postselection, which was originally proposed in [Phys. Rev. Lett. 128, 110506 (2022)]. Both works only provide a security proof against collective attacks, leaving open the question whether the protocol is secure against coherent attacks. In this note, we report on an attack on this protocol that demonstrates that coherent attacks are, in fact, stronger than collective attacks.
Cite
@article{arxiv.2306.07364,
title = {Coherent attacks are stronger than collective attacks on DIQKD with random postselection},
author = {Martin Sandfuchs and Ramona Wolf},
journal= {arXiv preprint arXiv:2306.07364},
year = {2023}
}