Continuous-variable quantum key distribution with entanglement in the middle

被引：72
作者：
Weedbrook, Christian [1 ,2 ]
机构：
[1] Univ Toronto, Ctr Quantum Informat & Quantum Control, Dept Elect & Comp Engn, Toronto, ON M5S 3G4, Canada
[2] Univ Toronto, Dept Phys, Toronto, ON M5S 3G4, Canada
来源：
PHYSICAL REVIEW A | 2013年 / 87卷 / 02期
基金：
加拿大自然科学与工程研究理事会;
关键词：
CRYPTOGRAPHY; SECURITY;
D O I：
10.1103/PhysRevA.87.022308
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We analyze the performance of continuous-variable quantum key distribution protocols where the entangled source originates not from one of the trusted parties, Alice or Bob, but from the malicious eavesdropper in the middle. This is in contrast to the typical simulations where Alice creates the entangled source and sends it over an insecure quantum channel to Bob. By using previous techniques and identifying certain error-correction-protocol equivalences, we show that Alice and Bob do not need to trust their source and can still generate a positive key rate. Such a situation can occur in a quantum network where the untrusted source originated in between the two users. DOI: 10.1103/PhysRevA.87.022308
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页数：5
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