摘要
提出了一种新的单向量子密钥分配方案.该方案利用光子的两列子波之间相位差关系形成的干涉结果进行编码,并且利用与干涉结果独立的光子偏振态进行窃听检测.并对该方案的效率和安全性进行了分析.理论分析表明,该方案的光子利用率为100%,而经典通信量仅约为BB84方案的一半,信息传输效率约为2n/(3n+4),高于BB84方案25%的效率值,随着传输光子数n的增大,效率值将趋近于66.7%.而且,该方案对于截获重发、测量重发、纠缠测量等常见的攻击,都具有很好的安全性.此外,对于现在的技术而言,该方案较易实现.
A one-way quantum key distribution scheme is proposed. The scheme utilizes the interference between two sub-waves of a photon with different phases for coding and uses the polarization of the photon which is independent of the interference to check the eavesdropping. Efficiency and security analyses are also given. The theoretical analysis shows that the utilization ratio of the photons is 100%, accompanying with about half volume of classical communications of BB84. And the information transmission efficiency is approximately 2n/（3n ＋4） which is higher than 25% of BB84 and runs to 66.7 % when the amount of transit photons n increases. Furthermore, it can effectively resist the common attack such as intercept-resend, measure-resend and entanglement-measure attack. Besides, this scheme is feasible with present-day technique.
出处
《东南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2009年第2期216-219,共4页
Journal of Southeast University：Natural Science Edition
基金
国家自然科学基金资助项目(60572071,60873101)
江苏省自然科学基金资助项目(BK2005053,BM2006504,BK2007104,BK2008209)
江苏省高校自然科学基金资助项目(06KJB520137)
关键词
量子密钥分配
相位编码
量子干涉
效率
安全性
quantum key distribution
phase coding
quantum interference
efficiency
security
