Semi-device-independent quantum protocols realize information tasks - e.g. secure key distribution, random access coding, and randomness generation - in a scenario where no assumption on the internal working of the devices used in the protocol is made, except their dimension. These protocols offer two main advantages: first, their implementation is often less demanding than fully-device-independent protocols. Second, they are more secure than their device-dependent counterparts. Their classical analogous is represented by random access codes, which provide a general framework for describing one-sided classical communication tasks. We discuss conditions under which detection inefficiencies can be exploited by a malicious provider to fake the performance of semi-device-independent quantum and classical protocols - and how to prevent it.
@article{arxiv.1210.1272,
title = {Detection loophole attacks on semi-device-independent quantum and classical protocols},
author = {Michele Dall'Arno and Elsa Passaro and Rodrigo Gallego and Marcin Pawlowski and Antonio Acin},
journal= {arXiv preprint arXiv:1210.1272},
year = {2015}
}