Method and system for anti-interference quantum secure direct communication

Abstract

The invention provides a method and a system for anti-interference quantum secure direct communication. The method comprises the following steps that: a sending end performs non-orthogonal state combination coding, randomly expands a bit to two bits, randomly selects two different base combinations, converts the two bits into corresponding quantum states in the base combinations and then sends the two bits through a quantum channel; and a receiving end randomly selects two same base combinations for quantum state measurement so as to realize definite measurement on one bit. The method and thesystem can effectively solve the problem of quantum secure direct communication under the condition of not accurate measurement on the quantum, and realize point-to-multipoint quantum information distribution.

Description

technical field [0001] The invention relates to the technical field of quantum security communication, in particular to a method and system for anti-interference quantum security direct communication. Background technique [0002] In the past 20 years, quantum information technology has received widespread attention and rapid development due to its unique performance. In particular, quantum key distribution (QKD), which can serve for secure communication networks, has become more and more perfect and mature, and it is foreseeable In recent years, QKD will be applied in practical secure communication systems, but QKD is only a non-deterministic random bit negotiation technology, and it is difficult to realize point-to-multipoint QKD with a specific key. Due to various reasons, the development of direct communication technology using quantum channels for predetermined secret information based on the quantum uncertainty principle is slow. [0003] In 2001, Almut Beige et al. p...

AI Technical Summary

Problems solved by technology

In 2003, Deng FuGuo et al. proposed Two-Step quantum secure direct communication (QSDC) based on quantum entanglement storage, and claimed that the Two-Step QSDC scheme is a truly secure quantum secure direct communication scheme, but according to his According to the proposed guidelines, the Two-Step QSDC scheme is not actually quantum direct communication in the true sense, because it is based on quantum storage and first performs the confidential distribution of entangled particles, and then distributes the information; this is equivalent to the two parties first sharing the key or distribution of auxiliary information

In short, the above scheme cannot realize secure quantum secret direct communication, and cannot resist quantum channel noise and eavesdropping interference

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