Quantum key distribution （QKD） is used in quantum cryptographic systems to exchange secret key between parties who need to communicate secretly. According to the structure of European Secoqc QKD network, a QKD proto...Quantum key distribution （QKD） is used in quantum cryptographic systems to exchange secret key between parties who need to communicate secretly. According to the structure of European Secoqc QKD network, a QKD protocol is proposed. Entanglement swapping between Einstein-Podolsky-Rosen （EPR） pairs can be used to exchange message bits in two remote places. Based on this idea, n ＋ 1 EPR pairs are used as logical quan- tum channel （for n nodes per routing）, while measurements of Bell operator are transmitted by classical channel. Random space quantum channel selection is exploited in our protocol to improve the probability of revealing Eve. Compared with traditional EPR protocol, the proposed protocol exhibits many features, which are minutely described.展开更多
与经典网络相比,QKD(Quantum Key Distribution)网络利用量子密钥分发技术能在公共网络中为数据通信提供无条件安全的密钥。欧洲Secoqc(Secure Communication Based on Quantum Cryptography)项目研究可大范围应用于绝对安全性通信网络...与经典网络相比,QKD(Quantum Key Distribution)网络利用量子密钥分发技术能在公共网络中为数据通信提供无条件安全的密钥。欧洲Secoqc(Secure Communication Based on Quantum Cryptography)项目研究可大范围应用于绝对安全性通信网络。详细介绍Secoqc QKD网络的结构及协议,及其在维也纳的实验网络。展开更多
文摘Quantum key distribution （QKD） is used in quantum cryptographic systems to exchange secret key between parties who need to communicate secretly. According to the structure of European Secoqc QKD network, a QKD protocol is proposed. Entanglement swapping between Einstein-Podolsky-Rosen （EPR） pairs can be used to exchange message bits in two remote places. Based on this idea, n ＋ 1 EPR pairs are used as logical quan- tum channel （for n nodes per routing）, while measurements of Bell operator are transmitted by classical channel. Random space quantum channel selection is exploited in our protocol to improve the probability of revealing Eve. Compared with traditional EPR protocol, the proposed protocol exhibits many features, which are minutely described.
文摘与经典网络相比,QKD(Quantum Key Distribution)网络利用量子密钥分发技术能在公共网络中为数据通信提供无条件安全的密钥。欧洲Secoqc(Secure Communication Based on Quantum Cryptography)项目研究可大范围应用于绝对安全性通信网络。详细介绍Secoqc QKD网络的结构及协议,及其在维也纳的实验网络。
