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Quantum key distribution with Bell states
Gao Fei 1 * #,Wen QiaoYan 1,Zhu FuChen 2
1.School of Science, Beijing University of Posts and Telecommunications
2.National Laboratory for Modern Communications
*Correspondence author
#Submitted by
Subject:
Funding: 教育部博士点基金,国家自然科学基金重大研究计划,北京市自然科学基金，National Laboratory for Modern Communications Science Foundation of China，ISN Open Foundation（No.20040013007,90604023,4072020）
Opened online:20 November 2007
Accepted by: none
Citation: Gao Fei ,Wen QiaoYan ,Zhu FuChen .Quantum key distribution with Bell states[OL]. [20 November 2007] http://en.paper.edu.cn/en_releasepaper/content/16430
 
 
A quantum key distribution (QKD) protocol based on Bell 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 key information. At the destination,the receiver performs Bell measurements and then obtains secure key. The property of entanglement swapping can improve the effciency of QKD. To show the security of this scheme, we present an explicit relation between the information that an eavesdropper can elicit and the corresponding error rate he/she would introduce. Furthermore, all the photons are still in Bell states finally and can be reused for new applications.
Keywords:Quantum Key Distribution; Cryptography; Information Security
 
 
 

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