Symmetric Device-Independent Quantum Key Distribution Against General Attack

Details Symmetric Device-Independent Quantum Key Distribution Against General Attack Symmetric Device-Independent Quantum Key Distribution Against General Attack

2012-02-15

arxiv.org/abs/1202.3232v2

Physics

Quantum Physics

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Scientific paper

A symmetric device-independent quantum key distribution (DIQKD) protocol is proposed in this paper, with Holevo limit and subadditivity of von Neumann entropy, one can bound Eve's ability with collective attack. Together with symmetry of this protocol, the state Eve prepared for Alice and Bob, and at the same time, her eavesdropping on Alice's and Bob's measurements can be definitely inferred at the assumption that Eve aims at maximizing her information gain. The optimal state under this circumstance can be solely bounded with Alice and Bob's statistical results on the quantity of Clauser-Horne-Shimony-Holt (CHSH) polynomial $S$, that is, our symmetric DIQKD has the same secure basis as that of Ekert91 protocol.

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