Multi-User Quantum Private Query Using Symmetric Multi-Particle W State

The previous quantum private query (QPQ) protocols based on quantum key distribution can only allow a single user to query the database. However, in the real environment, people can accomplish a task only by cooperating with each other. In this context, a multi-user quantum private query protocol ba...

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Bibliographic Details
Published in:International journal of theoretical physics 2022-03, Vol.61 (3), Article 71
Main Authors: Wang, Hai-Peng, Zhou, Ri-Gui
Format: Article
Language:English
Subjects:
Elementary Particles
Mathematical and Computational Physics
Physics
Physics and Astronomy
Protocol
Quantum cryptography
Quantum Field Theory
Quantum Physics
Queries
Theoretical
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Summary:The previous quantum private query (QPQ) protocols based on quantum key distribution can only allow a single user to query the database. However, in the real environment, people can accomplish a task only by cooperating with each other. In this context, a multi-user quantum private query protocol based on multi-particle W state is first proposed, where users could query an item of common interest in the database only if they work together. The proposed multi-user protocol not only has all the advantages of single-user QPQ protocol, such as loss tolerance and cheat-sensitive, but also becomes more sensitive to database owner’s deception with the increasing of the number of users.
ISSN:0020-7748
1572-9575
DOI:10.1007/s10773-022-05074-1