QKD-Based Quantum Private Query Protocol in the Single-Photon Interference Communication System
Bin Liu, Zhifeng Gao, Di Xiao, Wei Huang, Zhi-Qing Zhang, Yang Li, Bingjie Xu · IEEE Access · 2019
In this paper, we propose a quantum-key-distribution-based quantum private query protocol (QKD-based QPQ) utilizing the uncertainty relation of the photon path and the interference result in the single-photon interference circuit.The proposed protocol is loss-tolerant and easy to be realized in the quantum communication systems based on single-photon interference.Without any assumption on the dishonest party's computation ability, we prove that the dishonest user can only steal a little more than one item from the database, and any dishonest action of the database would be found by the user with a nonzero probability.Compared with other QKD-based QPQ protocols utilizing single-photon interference, the proposed protocol uses less quantum devices, which means the costs of the proposed protocol is lower.