Measurement-device-independent quantum key distribution(MDI-QKD) is immune to detector side channel attacks, which is a crucial security loophole problem in traditional QKD. In order to relax a key assumption that the...Measurement-device-independent quantum key distribution(MDI-QKD) is immune to detector side channel attacks, which is a crucial security loophole problem in traditional QKD. In order to relax a key assumption that the sources are trusted in MDI-QKD, an MDI-QKD protocol with an untrusted source has been proposed. For the security of MDI-QKD with an untrusted source, imperfections in the practical experiment should also be taken into account. In this paper, we analyze the effects of fluctuations of internal transmittance on the security of a decoy-state MDI-QKD protocol with an untrusted source. Our numerical results show that both the secret key rate and the maximum secure transmission distance decrease when taken fluctuations of internal transmittance into consideration. Especially, they are more sensitive when Charlie's mean photon number per pulse is smaller. Our results emphasize that the stability of correlative optical devices is important for practical implementations.展开更多
Like domestic law, international law can be used in domestic governance, where it can become an important instrument assisting China＇s Party and government to rule the country and manage state affairs. Incorporating ...Like domestic law, international law can be used in domestic governance, where it can become an important instrument assisting China＇s Party and government to rule the country and manage state affairs. Incorporating part of international law into domestic law and comprehensively advancing the rule of law in accord with the principle of national sovereignty demonstrate the openness and international vision of China＇s rule of law construction. Translating these propositions into concrete institutional practice will be of vital significance for improving the socialist rule of law with Chinese characteristics, advancing the international rule of law and promoting world peace.展开更多
基金Supported by the National Basic Research Program of China under Grant No.2013CB338002the National Natural Science Foundation of China under Grant Nos.61505261,61675235,61605248,11304397
文摘Measurement-device-independent quantum key distribution(MDI-QKD) is immune to detector side channel attacks, which is a crucial security loophole problem in traditional QKD. In order to relax a key assumption that the sources are trusted in MDI-QKD, an MDI-QKD protocol with an untrusted source has been proposed. For the security of MDI-QKD with an untrusted source, imperfections in the practical experiment should also be taken into account. In this paper, we analyze the effects of fluctuations of internal transmittance on the security of a decoy-state MDI-QKD protocol with an untrusted source. Our numerical results show that both the secret key rate and the maximum secure transmission distance decrease when taken fluctuations of internal transmittance into consideration. Especially, they are more sensitive when Charlie's mean photon number per pulse is smaller. Our results emphasize that the stability of correlative optical devices is important for practical implementations.
文摘Like domestic law, international law can be used in domestic governance, where it can become an important instrument assisting China＇s Party and government to rule the country and manage state affairs. Incorporating part of international law into domestic law and comprehensively advancing the rule of law in accord with the principle of national sovereignty demonstrate the openness and international vision of China＇s rule of law construction. Translating these propositions into concrete institutional practice will be of vital significance for improving the socialist rule of law with Chinese characteristics, advancing the international rule of law and promoting world peace.
