Volume 125, Number 4, February 2019
|Number of page(s)||5|
|Published online||22 March 2019|
Long-distance measurement-device–independent quantum secure direct communication
School of Science, Nanjing University of Science and Technology - Nanjing 210094, China
Received: 20 December 2018
Accepted: 13 February 2019
Quantum secure direct communication enables a direct message exchange over a quantum channel without any key generation in advance. Here we present a feasible protocol for long-distance measurement-device–independent quantum secure direct communication. The secure distance is increased by using ancillary entangled photon-pair sources and relay nodes. Meanwhile, its security is independent from measurement devices, which eliminates the potential loophole for eavesdropping in the detection systems. Moreover, this protocol can be implemented with linear optical devices and single-photon detectors.
PACS: 03.67.Hk – Quantum communication / 03.67.Dd – Quantum cryptography and communication security / 42.50.Ex – Optical implementations of quantum information processing and transfer
© EPLA, 2019
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