量子密钥分配
协议(科学)
计算机科学
钥匙(锁)
测量装置
量子密码学
计算
国家(计算机科学)
计算机网络
安全通信
计算机安全
理论计算机科学
分布式计算
量子
量子力学
物理
量子信息
算法
加密
医学
替代医学
病理
声学
作者
Sirui Peng,Xiaoming Sun,Hongyi Zhou
出处
期刊:Journal of The Optical Society of America B-optical Physics
[The Optical Society]
日期:2023-12-21
卷期号:41 (1): 258-258
摘要
Quantum key distribution (QKD) is a secure communication method that utilizes the principles of quantum mechanics to establish secret keys. The central task in the study of QKD is to prove security in the presence of an eavesdropper with unlimited computational power. In this work, we successfully solve a long-standing open question of the security analysis for the three-state QKD protocol with realistic devices, i.e., the weak coherent-state source. We prove the existence of the squashing model for the measurement settings in the three-state protocol. This enables the reduction of measurement dimensionality, allowing for key rate computations using the numerical approach. We conduct numerical simulations to evaluate the key rate performance. The simulation results show that we achieve a communication distance of up to 200 km.
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