J4 ›› 2015, Vol. 32 ›› Issue (2): 178-185.

• 量子光学 • 上一篇    下一篇

基于W态与Bell态纠缠的QDKD方案

颛孙少帅,陈红,蔡晓霞   

  1. 解放军电子工程学院, 安徽 合肥 230037
  • 收稿日期:2014-04-21 修回日期:2014-06-10 出版日期:2015-03-28 发布日期:2015-03-17

QDKD Based on W State and Bell State Entanglement

ZHUANSUN Shaoshuai, Chen Hong, Cai Xiaoxia   

  1. School of PLA Electronic Engineering Institute, Hefei 230037, China
  • Received:2014-04-21 Revised:2014-06-10 Published:2015-03-28 Online:2015-03-17

摘要:

为了提高密钥分发效率,利用量子密集编码的原理设计了一种基于W态和Bell态纠缠的量子确定性密钥分发方案(Quantum Deterministic Key Distribution, QDKD)。方案中,消息发送者Alice通过对持有粒子实施幺正操作实现确定性密钥的编码,接收方Bob利用粒子间联合测量获得确定性密钥。除去用于窃听检测的粒子,制备的粒子全部用于消息传输,每发送5个粒子可以实现5bits确定性密钥的分发。最后,利用信息论方法对方案进行安全性分析,结果表明,方案是安全可靠的,任何窃听行为能够被及时发现。

关键词: 幺正操作

Abstract:

In order to improve the efficiency of key distribution, a quantum key distribution protocol based on W state and Bell state entanglement is proposed via quantum dense coding. In the scheme, the sender Alice code the key successfully via local unitary operations, and the receiver Bob obtain the key with jointing measurement, all states can be used to transmit messages except those choose for checking eavesdroppers, 5bits deterministic key are distributed by 5 particles. Security analysis result by using information theory shows that the scheme is secure, any eavesdroppers could be found in time.

Key words: 量子光学, 量子确定性密钥分发, 分发效率, 密集编码, 幺正操作

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