Physics – Quantum Physics
Scientific paper
2011-09-07
Phys. Rev. A 85, 010301(R) (2012)
Physics
Quantum Physics
v2 replaces the 3-page abstract posted as v1: our results are now given with all necessary details. v3: published version
Scientific paper
10.1103/PhysRevA.85.010301
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.
Branciard Cyril
Cavalcanti Eric G.
Scarani Valerio
Walborn Stephen P.
Wiseman Howard M.
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