Continuous variable measurement equipment independent quantum key distribution method and system

Abstract

The invention provides a continuous variable measurement equipment independent quantum key distribution method and system. The method comprises the steps that M1, a sending end and a receiving end carry out quantum signal preparation and encoding; M2, the sending end and the receiving end transmit the quantum signals to the measuring end, the measuring end interferes with the quantum signals, andthe interfered quantum signals are detected; M3, carrying out information decoding on the detected quantum signls; M4, performing parameter evaluation according to the stored prepared quantum signals(XA, PA) and (XB, PB) and corresponding measurement values XC and PD disclosed by a measurement party by the sending end and the receiving end; and M5, performing data negotiation according to the decoded quantum signals and performing confidentiality enhancement according to parameter evaluation.

Description

technical field [0001] The present invention relates to the technical field of quantum secure communication, in particular, to a continuous variable measurement device-independent quantum key distribution method and system, and more specifically, to a new measurement device-independent quantum key based on continuous variable coherent states A distribution protocol, which specifically uses a phase matching method based on discrete modulation for quantum key distribution. Background technique [0002] The continuous variable quantum key distribution technology can use the method of coherent detection to enable two communication parties far apart to achieve key distribution with information theory security. Because the continuous variable quantum key distribution technology inherits many advantages of classical coherent optical communication, has higher channel capacity and integration with classical optical communication, this technology has received extensive attention from ...

AI Technical Summary

Problems solved by technology

However, in the actual operation of this type of scheme, if the effective security key is to be generated, the efficiency of the continuous variable quantum coherent detection required to be used reaches an almost ideal condition, which greatly limits the practical application of CV-MDI-QKD

In fact, so far there is almost no report of a real CV-MDI-QKD experiment

Images