QUANTUM KEY DISTRIBUTION BY CONSTRUCTING NONORTHOGONAL STATES WITH BELL STATES

被引：12

作者：

Gao, Fei ^{[1
,3
]}

Gui, Fen-Zhuo ^{[1
]}

Wen, Qiao-Yan ^{[1
]}

Zhu, Fu-Chen ^{[2
]}

机构：

[1] Beijing Univ Posts & Telecommun, State Key Lab Networking & Switching Technol, Beijing 100876, Peoples R China

[2] Natl Lab Modern Commun, Chengdu 610041, Peoples R China

[3] Beijing Univ Posts & Telecommun, Sch Sci, Beijing 100876, Peoples R China

来源：

INTERNATIONAL JOURNAL OF MODERN PHYSICS B | 2010年 / 24卷 / 23期

关键词：

Quantum key distribution; quantum cryptography; entanglement swapping; nonorthogonal states; Bell states; CRYPTOGRAPHY;

D O I：

10.1142/S021797921005661X

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A quantum key distribution (QKD) protocol based on constructed nonorthogonal states is proposed. By transmitting the photons from Bell states in random order the sender constructs nonorthogonal states, which can prevent an eavesdropper from extracting the key information. At the destination, the receiver performs Bell measurements and then obtains secure key. Different from previous nonorthogonal-states-based QKD protocols, our protocol exhibits a new feature, that is, the users can also obtain some key bits even when they choose different "bases"! Thus it can reach a higher efficiency in theory. Besides, we present a trade-off between the information that an eavesdropper can elicit and the corresponding error rate he/she would introduce, which shows that our protocol is secure.

引用

页码：4611 / 4618

页数：8

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