Quantum database privacy query method based on one-way transmission

Abstract

The invention discloses a one-way transmission quantum database privacy query method. The method includes querying a user to randomly generate a mixed sequence of single photons and Bell states, and the database selects half of the particles for wiretapping detection, and the database selects Z Base or Bell base is measured, the database announces two binary bits according to the measurement results, and the query user obtains the key bit with a certain probability, and the database and the query user use the post-processing method to obtain the final key. The invention only needs to query the user to send quantum information to the database owner once to realize the user's privacy query to the database, and the implementation method is simpler; on the basis of ensuring the completion of the privacy query, the use efficiency of qubits is improved, and no matter whether it is internal Neither an external eavesdropper can obtain additional key information.

Description

technical field [0001] The invention belongs to the technical field of quantum privacy query, and in particular relates to a one-way transmission quantum database privacy query method. Background technique [0002] Quantum secure communication technology has moved from laboratory demonstration to industrialization. In cities, the metropolitan quantum network communication constructed by optical fiber has begun to be practically applied, and my country has achieved an international leading position in metropolitan optical fiber quantum communication. After years of hard work, China has become one of the world's first-class quantum information research ranks, and is also at the forefront of the world in quantum communication technology. It has completed the construction of large-scale quantum communication metropolitan area networks in Hefei and Jinan, and the large-scale "Beijing-Shanghai trunk line" The optical fiber quantum communication backbone network was also officiall...

AI Technical Summary

Problems solved by technology

[0006] 2. Qubits are susceptible to interference from other factors: single photons are affected by noise in the actual quantum transmission channel, which may cause some interference to the measurement results; external and internal eavesdroppers will also affect the measurement results

[0007] 3. In the existing quantum privacy query scheme, the results of measuring particles are diverse, and it is difficult to distinguish them with classical information 0, 1

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