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

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

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

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arxiv 1109.1435 v3 pith:O3GKYMBN submitted 2011-09-07 quant-ph

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 This is my paper

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keywords di-qkdquantumsecuritydevice-independentdistributionfeasibilitylinkmeasurement

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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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