Quantum safety communication eavesdropping detection method based on four-particle W state

Abstract

A quantum safety communication eavesdropping detection method based on a four-particle W state can improve the eavesdropping detection efficiency to 69 percent, and adopts the technical scheme that during transmitting of quantum safety communication, particles to be detected which are in the four-particle W state are randomly inserted into a transmission particle sequence by a sender, and after receiving the transmitted particle sequence, a receiver extracts the particles to be detected, performs four-particle W state measuring, and analyzes the safety in a communication process through a measurement result. By the security analysis, the eavesdropping detection efficiency of the method can reach 69 percent, so that high safety requirements on the quantum safety communication can be met well.

Description

technical field [0001] The invention relates to an eavesdropping detection method in quantum security communication. Using four-particle W states as detection particles can increase the eavesdropping detection efficiency to 69%. Background technique [0002] Practice and theory have proved that there are always security problems in the field of quantum security communication, such as eavesdropping, denial of service attacks, man-in-the-middle attacks and other attacks. These attacks will cause confidential information to be eavesdropped or cannot be accurately transmitted to the receiver, especially through " The eavesdropping of confidential information by methods such as "entanglement" will cause great damage to the communication process. In the field of quantum security communication, the eavesdropping detection efficiency of existing communication protocols is not very high. For example, in 2003, Deng Fuguo and others proposed a two-step quantum direct communication base...

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Problems solved by technology

[0002] Practice and theory have proved that there are always security problems in the field of quantum security communication, such as eavesdropping, denial of service attacks, man-in-the-middle attacks and other attacks. These attacks will cause confidential information to be eavesdropped or cannot be accurately transmitted to the receiver, especially through " The eavesdropping of confidential information by methods such as "entanglement" will cause great damage to the communication process

In the field of quantum security communication, the eavesdropping detection efficiency of existing communication protocols is not very high. For example, in 2003, Deng Fuguo and others proposed a two-step quantum direct communication based on EPR pairs based on quantum direct communication and quantum ultra-dense coding. Protocol [1], the detection efficiency can only reach 50%, which is far from meeting the requirements of secure communication

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