Quantum Secure Multi-party Computing Related Research

Quantum secure multiparty computation is combining secure multiparty com-putation protocols and quantum mechanics.QSMC has superior security perfor-mance and makes it possible to perform secure multiparty computcation meanwhile resisting quantum computing attacks.As an important part of quantum cryptog-raphy,quantum secure multiparty computation has many research branches.This paper mainly studies the two main branches of quantum secure multiparty compu-tation:quantum secret sharing and some quantum secure multiparty computation expansion protocols based on quantum oblivious key transfer.Specifically,quan-tum secret sharing reduces the risk of key leakage by allowing multiparty to jointly manage the key.Quantum oblivious key transfer can effectively solve the quantum private query problem.It does not only protects the security of database but also protects the user privacy of database searchers.In the quantum secret sharing part,we find that there are a special kind of entangled states(like |?n>and |Sn>)that can achieve secret sharing after proper codings.To illustrate our research,we design quantum secret sharing protocols using two n-particle entangled states and characterized the property of these entangled states.By analyzing and inducting the process of our protocol,a general model is also proposed.Finally,we compare and discuss the feasibility and efficiency of the model.In the part of quantum secure multiparty computation expansion protocol based on quantum oblivious key transfer,we first design a secure quantum oblivious key transfer protocol using asymmetric-structure entanglement states.Through the research of quantum private query,we find that quantum oblivious key transfer can also be applied in other quantum secure multiparty computation fields.Therefore,we apply the quantum oblivious key transfer protocol to the quantum set-member decision problem and the quantum point-inclusion problem.For the proposed pro-tocol,we not only verify its security but also analyze and discuss its efficiency.