Practical Quantum Database Private Query Protocol with Classical Database Owner

Abstract

Based on single photons, a practical quantum private query protocol is proposed. The powerful user Alice can obtain an item from a limited “classical” database owner Bob using the idea of semi-quantum in the proposed protocol. It does not require that all the participants equipped with expensive quantum resources. Therefore, our protocol is easier to implement under the current technology. Furthermore, the simulate quantum circuit for the proposed protocol is descried in the paper. And security of the proposed schemes has been analyzed. The results show that the protocol can not only resist an external eavesdropping attacks but also protect the database and user owner privacy.