Research On QKD Based Quantum Cryptography Cloud Platform

Quantum secure communication is based on the principle of quantum mechanics.Quantum key distribution(QKD)system is used for secure communication.QKD is a process in which both sides negotiate to generate shared passwords based on QKD protocol.The generated passwords are unconditionally secure in theory.The research of quantum secure communication technology is a key development direction of the emerging interdisciplinary which is the combination of quantum mechanics and information science.Using quantum secure communication technology to achieve information security applications is gradually showing the characteristics of demand traction,policy driven and rapid development.At present,the quantum secure communication technology gradually goes out of the laboratory and develops to the practical stage.Quantum key distribution is based on the quantum state superposition,non cloning and uncertainty principle.Although it is an unconditionally secure quantum key distribution method in theory,in reality,the quantum key distribution system equipment is very strict to the operating environment,and needs to rely on the complex,reliable and reliable methods Due to the high cost of experimental equipment and low bit rate,there are still many challenges in the practical application of quantum cryptography based on QKD technology.It is an effective way to generate and manage quantum cryptography in a centralized way to realize cryptographic services in the cloud environment.In order to innovate the application architecture of quantum key distribution technology and form a secure cryptographic service capability in the cloud environment,this paper designs a scheme of quantum cryptography cloud platform based on QKD,proposes a three-layer network architecture,and discusses the feasibility of the scheme combined with the practical problems of each layer.The platform includes QKD link layer,cryptographic network management layer and application service layer.The QKD link layer includes three sets of practical QKD optical link systems based on BB84 protocol,three node polarization coding and high-speed time phase coding,respectively,In this paper,we choose the long-distance high-speed time phase coded QKD system built in the frigid zone of China to carry out the research,and design the simulation model for the bit rate and bit error rate index of the test system.According to the physical performance of the single photon detector in Geiger mode,we explore the influence of the change of the performance parameters of the single photon detector on the bit rate and bit error rate of the system,A physical model is established to study the influence of the temperature change in the external environment on the bit error rate of QKD system,and then the relationship between the temperature change and the stability of the whole system is analyzed.In order to ensure the effectiveness of quantum cryptography managed by cloud platform and provide users with safe,reliable and high-quality quantum cryptography services,an experimental system is established to analyze the random performance of cryptography,In this paper,a new visual random verification method based on statistical characteristic parameters is proposed,which divides the security level of the password and stores the password by level classification.The main purpose of application service layer is to provide users with flexible and effective quantum cryptography service technology.In this paper,a point-to-point destruction technology based on quantum cryptography is proposed for file transmission service.Users can apply for passwords of different security levels to achieve targeted distribution of passwords to obtain the data needed for encryption and carry out safe and effective information transmission service.The construction concept and feasibility study of QKD based quantum cryptography cloud service platform proposed in this paper have positive reference significance for the practical development of quantum secure communication technology.