Privacy-preserving quantum protocol for finding the maximum value

Abstract In this paper, we first define a primitive protocol of secure multiparty computations to privately compute the logic operator “OR” (SMC_OR). Accordingly, design feasible quantum SMC_OR by using single photons, which can achieve information-theoretical security in semi-honest model. Furthermore, adopt proposed solve an interesting but important privacy-preserving problem, i.e., finding maximum value among many secrets. Finally, simulate related protocols Qiskit and verify correctness feasibility protocols.