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arXiv 1003.2472quant-ph
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一种新的基于频率和时间编码的量子密钥分发方案

A New Quantum Key Distribution Scheme based on Frequency and Time Coding

Chang-hua Zhu, Chang-xing Pei, Dong-xiao Quan, Nan Chen, Yun-hui Yi

摘要:

提出了一种新的基于频率和时间编码的量子密钥分发(QKD)方案,该方案的安全性基于频率-时间不确定关系。在该方案中,二进制信息序列在发送端的中心频率或时间延迟上被随机编码。当选择频率编码时,单光子脉冲的中心频率对于位“0”被设置为ω 1,并且对于位“1”被设置为ω 2。而当选择时间编码时,单光子脉冲对于比特“0”不延迟,并且对于“1”延迟tao。在接收端,随机测量脉冲的频率或时间延迟,经过基比较、数据协调和保密放大后得到最终的密钥。该方法可以有效地检测出光子分裂攻击,降低光纤信道和环境中的噪声对量子密钥分配系统的影响。

英文摘要:

A new scheme of quantum key distribution (QKD) using frequency and time coding is proposed, in which the security is based on the frequency-time uncertainty relation. In this scheme, the binary information sequence is encoded randomly on either the central frequency or the time delay at the sender. The central frequency of the single photon pulse is set as omega1 for bit "0" and set as omega2 for bit "1" when frequency coding is selected. While, the single photon pulse is not delayed for bit "0" and is delayed in tao for "1" when time coding is selected. At the receiver, either the frequency or the time delay of the pulse is measured randomly, and the final key is obtained after basis comparison, data reconciliation and privacy amplification. With the proposed method the photon splitting attack can also be detected, and the effect of the noise in the fiber channel and environment on QKD system can be reduced effectively.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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