Quantum Private Query

Quantum privacy query is a quantum solution to the symmetric privacy information retrieval problem. Quantum privacy query scheme mainly uses the basic principles of quantum mechanics to protect the privacy of user Alice and database Bob so that the privacy query can be completed safely. Quantum privacy query is different from quantum key distribution. In the quantum key distribution scenario, the parties trust each other and do not attack each other. However, in quantum privacy query, the two parties do not trust each other. They both have private information that they do not want the other party to have, so they need to prevent the other party from stealing their own private information.