Multi-party Semi-quantum Secret Sharing Protocol based on Measure-flip and Reflect Operations

Abstract: Semi-quantum secret sharing (SQSS) protocols serve as fundamental frameworks in quantum secure multi-party computations, offering the advantage of not requiring all users to possess intricate quantum devices. However, the current landscape of SQSS protocols predominantly caters to bipartite scenarios, rendering them inadequate for practical multi-party secret sharing requirements. Addressing this gap, this paper proposes a novel SQSS protocol based on multi-particle GHZ states. In this protocol, the quantum user distributes predetermined secret information to multiple classical users with limited quantum capabilities, necessitating collaborative efforts among all classical users to reconstruct the correct secret information. By utilizing measure-flip and reflect operations, the transmitted multi-particle GHZ states can all contribute keys, thereby improving the utilization of transmitted particles. Security analysis shows that the protocol's resilience against prevalent external and internal threats. Additionally, employing IBM Qiskit, we conduct quantum circuit simulations to validate the protocol's accuracy and feasibility. Compared with similar studies, the proposed protocol has advantages in terms of protocol scalability, qubit efficiency, and shared message types.