文献类型：期刊文献

英文题名：Discrete-phase-randomized measurement-device-independent quantum key distribution

作者：Cao, Zhu[1,2]

机构：[1]East China Univ Sci & Technol, Minist Educ, Key Lab Adv Control & Optimizat Chem Proc, Shanghai 200237, Peoples R China;[2]Tongji Univ, Shanghai Inst Intelligent Sci & Technol, Shanghai 200092, Peoples R China

年份：2020

卷号：101

期号：6

外文期刊名：PHYSICAL REVIEW A

收录：;EI(收录号：20202808921754);WOS:【SCI-EXPANDED(收录号:WOS:000541400900003)】；

基金：This work was supported by the internal Grant No. SLH00202007 from East China University of Science and Technology.

语种：英文

外文关键词：Random processes - Side channel attack

摘要：Measurement-device-independent quantum key distribution removes all detector-side attacks in quantum cryptography, and in the meantime doubles the secure distance. The source side, however, is still vulnerable to various attacks. In particular, the continuous phase randomization assumption on the source side is normally not fulfilled in experimental implementation and may potentially open a loophole. In this work, we first show that indeed there are loopholes for imperfect phase randomization in measurement-device-independent quantum key distribution by providing a concrete attack. Then we propose a discrete-phase-randomized measurement-device-independent quantum key distribution protocol as a solution to close this source-side loophole.