We discuss quantum key distribution protocols and their security analysis, considering a receiver-device-independent (RDI) model. The sender's (Alice's) device is partially characterized, in the sense that we assume bounds on the overlaps of the prepared quantum states. The receiver's (Bob's) device requires no characterisation and can be represented as a black-box. Our protocols are therefore robust to any attack on Bob, such as blinding attacks. In particular, we show that a secret key can be established even when the quantum channel has arbitrarily low transmission by considering RDI protocols exploiting sufficiently many states. Finally, we discuss how the hypothesis of bounded overlaps can be naturally applied to practical devices.
@article{arxiv.2111.04351,
title = {Receiver-Device-Independent Quantum Key Distribution Protocols},
author = {Marie Ioannou and Pavel Sekatski and Alastair A. Abbott and Denis Rosset and Jean-Daniel Bancal and Nicolas Brunner},
journal= {arXiv preprint arXiv:2111.04351},
year = {2022}
}
Comments
Updated to journal version. See also the companion paper where a proof-of-principle experiment is reported arXiv:2104.14574