The Design And Analysis Of Multi-party Quantum Communication Protocol Based On Grover’s Algorithm

Quantum informatics is a new subject formed by the integration of quantum mechanics and information science.It mainly consists of two parts: quantum communication and quantum computation.Multi-party quantum communication protocol is an important content in the field of quantum informatics.Compared with classical communication protocol,the proposed multi-party quantum communication protocol which combines Grover’s quantum algorithm effectively solves the security and efficiency problems of classical communication protocol in the process of information transmission.In our paper,we focus on the two aspects of quantum key agreement and quantum secure communication.We understand that quantum information can be transmitted safely and efficiently by using entangled particles as information carriers,and through related unitary operations and corresponding fundamental measurements of entangled particles.The main research results of the paper are as follows:(1)By studying the related literature on quantum key agreement protocols,we design a multi-party quantum key agreement(MQKA)protocol based on Grover’s algorithm.At present,there are a few MQKA protocols using quantum search algorithm,and MQKA requires that the final key must be negotiated equally by all participants.Our protocol uses Bell states as quantum resource.Based on the characteristics of Grover’s algorithm,the MQKA protocol which we design well reflects the fairness and security in the process of key agreement.(2)By studying the related literature on quantum secure communication protocols,we design a controlled bidirectional quantum secure communication(CBQSC)protocol based on Grover’s algorithm as coding function.We also use Bell states as quantum resources in this protocol.When quantum bits(Qubit)are transmitted in dual quantum channels,we adopt the method of adding controlled-not gate(CNOT)to avoid information leakage.Through analysizing the protocol,we find that our protocol can not only prevent information leakage,but also improve the efficiency of information transmission.And the security analysis shows that Grover algorithm has significant effect in the construction of CBQSC protocol.