Research On Quantum Dialogue Theory Without Information Leakage Based On Grover Search Algorithm Algorithm

With the development of human computing power,especially the development of quantum algorithms based on the characteristics of quantum parallelism,the security of classical cryptography is seriously threatened.Therefore,the research of quantum cryptography has been widely concerned by information security researchers and its research scope has been gradually expanded.One of the reasons quantum computing is generally accepted is that it has the best chance of breaking through existing conventional computing power.The combination of quantum algorithm and information security can play an important role in solving intractable traditional problems.In this paper,based on Grover search algorithm,the protocol of quantum dialogue communication is studied,and the theoretical efficiency of quantum communication is improved.The specific research work is as follows:(1)firstly,a quantum conversation scheme without information disclosure based on Grover search algorithm is proposed.The parallel characteristics of Grover search algorithm can accelerate the search of target information and reduce the complexity,so that two particles of each quantum state in the scheme can be transmitted at the same time,reduce the use of quantum bits,and improve the communication efficiency of the protocol.The communication parties use the controlled NOT gate(c-not)to detect the channel eavesdropping and improve the reliability of the communication channel.Compared with other schemes,the analysis proves that this scheme is more efficient.(2)then,a controlled quantum conversation based on Grover search algorithm is proposed.Include a third party in the course of the conversation to supervise the exchange of private information between the communicating parties.The purpose of this protocol is not to find a clever attack strategy,but to analyze the security of quantum conversations from a different Angle(information leakage).(3)analyzes the internal attack defects in the quantum key negotiation protocol of Sun et al.and proposes an improved multi-party quantum secret key negotiation protocol based on the characteristics of Grover search algorithm,which can effectively solve the problem of collusion attack by internal participants,guarantee the correctness and privacy of participant keys at the same time,and improve the security of the protocol.