Measurement-device-independent quantum secret sharing
Xiuqing Yang, Kejin Wei, Haiqiang Ma, Shihai Sun, Hongwei Liu, Zuohan, Li, Zhenqiang Yin, Yungang Du, Lingan Wu
TL;DR
This paper introduces a measurement-device-independent quantum secret sharing protocol that ensures secure key distribution even with untrusted measurement devices, demonstrating feasibility over long distances with current technology.
Contribution
It proposes a novel MDI-QSS protocol based on MDI-EW, providing security bounds against collective attacks and showing practical long-distance implementation via simulations.
Findings
Secure QSS over 136 km with single-photon sources
Tight bounds for collective attacks improve security analysis
Feasibility of long-distance quantum communication with untrusted devices
Abstract
Measurement-device-independent entanglement witness (MDI-EW) will always give an affirmative certification for witnessing entanglement with untrusted measurement apparatuses. Using the MDI-EW method, we propose a measurement-device-independent quantum secret sharing (MDI-QSS) protocol that Charlie can securely distribute a key between the two agents Alice and Bob. A tight bound for collective attacks can provide good bounds on the long-distance MDI-QSS with source flaws. Then we show through numerical simulations that using single-photon source a secure QSS over 136 km can be achieved.
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Taxonomy
TopicsQuantum Information and Cryptography · Quantum Computing Algorithms and Architecture · Quantum Mechanics and Applications