Reference-frame-independent quantum key distribution with an untrusted source

• 来源期刊: 中国物理B（英文版）
• 关键词: quantum key distribution reference frame independent finite key untrusted source
• 年，卷（期）: 2020,（3）
• 页码范围: 92-99
• 页数: 8页
• 语种: 英文
• DOI: 10.1088/1674-1056/ab695d

摘要

Reference frame independent quantum key distribution (RFI-QKD) allows two legitimate parties to share the common secret keys with the drift of reference frames. In order to reduce the actual requirements of RFI-QKD protocol on light source and make it more suitable for practical applications, this paper gives a specific description of RFI-QKD protocol with an untrusted source and analyzes the practical security of this protocol based on the two-way"plug and play"structure commonly used in practical systems. In addition, we also investigate the performance of RFI-QKD with an untrusted source considering statistical fluctuations based on Chernoff bound. Using simulations, we compare the secret key rate of RFI-QKD with an untrusted source to RFI-QKD with trusted source. The results show that the performance of RFI-QKD with an untrusted source is similar to that of RFI-QKD with trusted source, and the finite data size clearly effects the performance of our protocol.