Schematic of our FP-MDIQKD protocol (IMAGE)

Science China Press

Schematic of our FP-MDIQKD protocol

Caption

At Alice’s (Bob’s) site, the simplified transmitter contains a laser source and an encoder. The encoder modulates the phase of the optical pulses. The modulation information of the encoder should be monitored to characterize the deviation between ideal and realistic pulses. If the untrusted Charlie is honest, he measures the signals received using an interference measurement.

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