Phys.org October 11, 2018
The key problem of practical quantum secure direct communication (QSDC) is that apparatuses used in practical quantum communication systems have some defects, and these imperfections, especially defects in the measurement devices, can lead to leakage of information and affect the security of practical QSDC. Researchers in China proposed a measurement-and-device-independent quantum secure direct communication protocol using Einstein-Podolsky-Rosen pairs. This protocol eliminates all loopholes related to measurement devices, which solves a key obstacle in practical quantum secure direct communication. The protocol has also an extended communication distance, and a high communication capacity…read more. TECHNICAL ARTICLE
Illustration of the MDI-QSDC protocol. Credit: ©Science China Press