Measurement-device-independent quantum key distribution with insecure sources

• URL: http://arxiv.org/abs/2107.07803v1
• Date: Fri, 16 Jul 2021 10:14:57 GMT
• Title: Measurement-device-independent quantum key distribution with insecure sources
• Authors: Hua-Jian Ding, Xing-Yu Zhou, Chun-Hui Zhang, Jian Li and Qin Wang
• Abstract summary: Measurement-device-independent quantum key distribution (MDI-QKD) can eliminate all detector side-channel loopholes and has shown excellent performance in long-distance secret keys sharing. Here, we present a general formalism based on reference technique to prove proofs of MDI-QKD against any possible sources imperfection/or side channels.
• Score: 11.835944016730302
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Measurement-device-independent quantum key distribution (MDI-QKD) can eliminate all detector side-channel loopholes and has shown excellent performance in long-distance secret keys sharing. Conventional security proofs, however, require additional assumptions on sources and that can be compromised through uncharacterized side channels in practice. Here, we present a general formalism based on reference technique to prove the security of MDI-QKD against any possible sources imperfection and/or side channels. With this formalism, we investigate the asymptotic performance of single-photon sources without any extra assumptions on the state preparations. Our results highlight the importance of transmitters' security.

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