Transmitter-independent quantum key distribution method and system

Abstract

The application relates to a transmitting-device-independent quantum key distribution method and system, and mainly aims to solve the device dependence problem of a light source end in quantum key distribution. The application utilizes the inherent asymmetric property of 1sDI, integrates the entanglement source originally as a third party into a transmitter, and adjusts the originally fixed entangled state to be variable, so that the input parameter of the transmitting end is transferred from the measurement of the entangled state to the entangled state itself, the photon loss introduced by the modulation device of the transmitting end is significantly reduced, and the practicability of the scheme is greatly improved. Moreover, the TDI-QKD scheme provided by the application has a simple structure, has the same transmission distance as the standard QKD, and can effectively resist coherent attacks.

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