Single photon beam-splitting attack method for counter-intuitive quantum key distribution system

Abstract

The invention discloses a single photon beam-splitting attack method for a counter-intuitive quantum key distribution system and relates to quantum cryptography communication technology. In the method, single photon signals transmitted in a channel are split by a beam splitter; one part of signals are intercepted and simultaneously the other part of signals are transmitted to a receiving party bya lossless or low-loss channel. According to the working principle of a Michelson interferometer, the two parts of signals can generate interference when simultaneously returned to the beam splitter and at the time if measuring a photon, an eavesdropper sends the photon to a sending party, wherein the polarization mode of the measured photon is the key bit. The method can make the eavesdropper acquire part of key information under the dissimulation of noise and simultaneously does not cause any error in a key string distributed by a legal communication party. The invention provides a method for effectively attacking the counter-intuitive quantum key distribution system, which is also an effective safety test method for the system.

Description

technical field [0001] The invention relates to quantum secret communication technology, in particular to a single-photon beam-splitting attack method on an anti-intuitive quantum key distribution system. Background technique [0002] As we all know, people's life is inseparable from communication and communication. From the emergence of communication tools such as telegraphs and telephones to the rapid development of communication networks and the Internet, people's communication has become more and more convenient, and the information that needs to be exchanged is also increasing day by day. For some purpose, people often only want the expected people to see the messages they send in the public channel, and they don't want others to get the information. This is especially true in the military and commercial spheres. The disclosure of a military secret may lead to the defeat of the war, and the disclosure of a commercial secret may bring huge economic losses to the compan...

AI Technical Summary

Problems solved by technology

[0023] 2. If the photon sent by Alice is in a different polarization, that is, |V>, then Bob's measurement will not work, which is equivalent to letting the signal go directly

Since the anti-intuitive QKD scheme was just proposed in 2009, there is still a lack of security testing methods for this system, and further research and analysis are needed

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