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arXiv · 1109.1435

One-sided Device-Independent Quantum Key Distribution: Security, feasibility, and the connection with steering

Cyril Branciard·Eric G. Cavalcanti·Stephen P. Walborn·Valerio Scarani·Howard M. Wiseman
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Abstract

We analyze the security and feasibility of a protocol for Quantum Key Distribution (QKD), in a context where only one of the two parties trusts his measurement apparatus. This scenario lies naturally between standard QKD, where both parties trust their measurement apparatuses, and Device-Independent QKD (DI-QKD), where neither does, and can be a natural assumption in some practical situations. We show that the requirements for obtaining secure keys are much easier to meet than for DI-QKD, which opens promising experimental opportunities. We clarify the link between the security of this one-sided DI-QKD scenario and the demonstration of quantum steering, in analogy to the link between DI-QKD and the violation of Bell inequalities.

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Cyril Branciard, Eric G. Cavalcanti, Stephen P. Walborn, Valerio Scarani, Howard M. Wiseman. 2012-01-23. One-sided Device-Independent Quantum Key Distribution: Security, feasibility, and the connection with steering. https://doi.org/10.1103/physreva.85.010301

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