Two semi-quantum secure direct communication schemes based on Bell states

Abstract

The invention belongs to the technical field of network communication, two semi-quantum secure direct communication schemes based on Bell states are proposed, through the session of the protocol, thereceiver of the semi-quantum secret information only needs to measure the two columns of sequences sent by the sender of the quantum information with the classical measurement bases {|0>, |1>}, and then obtains the n-bit secret information or the 2n-bit secret information by comparing the two cases in which the initial Bell state may collapse. The invention provides two semi-quantum secure directcommunication schemes based on Bell states, which can allow semi-quantum users to participate in communication. On the one hand, it reduces the cost of users; on the other hand, it reduces the difficulty of protocol implementation because of the simple and easy implementation of semi-quantum operation; both protocols only use Bell states as quantum information carriers and do not require additional decoy photons to participate in eavesdropping detection. It reduces the complexity of the protocol and promotes the implementation of the quantum secure direct communication protocol.

Description

technical field [0001] The invention belongs to the technical field of network communication, and in particular relates to a half-quantum safe direct communication scheme based on two Bell states. Background technique [0002] At present, the existing background technology in the industry is as follows: [0003] In the context of the increasingly perfect quantum technology, my country has built a 2,000-kilometer-long Beijing-Shanghai quantum communication trunk line, the metropolitan optical fiber quantum communication technology has matured, and the quantum communication network has entered the practical application stage from the laboratory research stage. Quantum cryptography is an interdisciplinary subject that combines quantum physics and classical cryptography. It is a new cryptographic system that uses the basic characteristics of quantum physics to realize cryptographic ideas. Compared with classical cryptography relying on computational complexity to achieve commun...

AI Technical Summary

Problems solved by technology

There are two ways to reduce the hardware cost of users: one is to meet the actual requirements through continuous research and development of new high-efficiency hardware devices, but the research and development costs are high and the progress is slow; the other is to modify the quantum communication protocol itself so that classical users who do not have quantum processing capabilities Or semi-quantum users participate in quantum communication, but the protocol itself needs to be well thought out

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