Quantum dialogue method irrelevant to measurement equipment based on hyper-entanglement

Abstract

The invention discloses a quantum dialogue method irrelevant to measuring equipment based on super-entanglement. The method comprises the following steps that two communication parties randomly prepare a super-entanglement state and a single photon respectively to form corresponding photon sequences; the third detection party performs hyper-entangled Bell state measurement on the photon sequence sent by the communication party and publishes a measurement result, and the communication party performs security detection according to the measurement result; two communication parties simultaneouslyencode information at different degrees of freedom and randomly perform security detection encoding, and the process is similar to quantum secure direct communication at different degrees of freedom;and the two communication parties send the coded photon sequence to the detection party, the detection party performs hyper-entangled Bell state measurement again and publishes a result, and the communication party decodes information according to the result to complete dialogue. According to the method, bidirectional quantum secure direct communication can be realized, communication efficiency is effectively improved, meanwhile, security holes related to measurement equipment and information leakage can be eliminated, and the method has relatively high flexibility, i.e., information codes ondifferent degrees of freedom do not influence each other.

Description

technical field [0001] The invention adopts the measurement device-independent quantum dialogue method realized by the super-entangled state, can realize two-way quantum safe direct communication, and belongs to the field of quantum safe communication. Background technique [0002] In 1984, Bennett and Brassard proposed the first quantum key distribution (QKD) protocol - BB84 protocol, marking the birth of quantum cryptography; Quantum Secure Direct Communication (QSDC) is different from QKD and is a new quantum communication The fundamental difference between QSDC and QKD is that QSDC does not need to generate a quantum key, and can directly transmit secret information in a quantum channel without leakage, which improves communication efficiency. In 2000, Long Guilu et al. proposed the first quantum-safe direct communication scheme—an efficient two-step QSDC scheme. In 2003, Deng Fuguo and others proposed a two-step QSDC protocol based on EPR entanglement pairs by using th...

AI Technical Summary

Problems solved by technology

[0005] In the existing QD protocols, although some protocols solve the security problems of information leakage and side channel attacks, their communication efficiency is not high.

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