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Nanjing University has successfully experimentally realized a measurement-device-independent quantum cryptographic conferencing (MDI-QCC) network, marking a significant leap from theoretical proposals to practical multi-user implementation. By utilizing three-photon GHZ states instead of standard two-photon Bell states, the team achieved secure key rates of 7.54 bits per second while maintaining immunity to detection-side attacks, establishing a new benchmark for future quantum communication infrastructure.

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Nanjing University team upgrades a key quantum security protocol

Quantum ZeitgeistSeptember 22, 20263 min read

Nanjing University demonstrated a measurement-device-independent Quantum Cryptographic Conferencing (QCC) network, extending two-user Quantum Key Distribution.

Researchers at Nanjing University have experimentally demonstrated a measurement-device-independent quantum cryptographic conferencing (MDI QCC) network, an important step toward building practical multi-user quantum communication systems. The group of Prof. Xiao-Song Ma achieved conference key rates of up to 7.54 bits per second with losses of 14.1 dB, utilizing a refined protocol and demonstrating…

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