Research On Quantum Secure Communication Network Based On SDN And Network Slicing

Quantum secure communication is a communication method that uses quantum key distribution to establish and encrypt a communication key between the sender and the receiver.With the research and development of quantum computing and new algorithms,the encryption method using public key cryptosystem becomes no longer secure.The characteristics of quantum secure communication technology enable it to make up for the insufficiency of traditional communication network security,and it has become a hot spot of current research and development.With the full commercialization of 5G network communications,some new network structures and network technologies have emerged,such as software-defined network architecture and network slicing technology.The emergence of these technologies provides new ideas for the existing network architecture,but also brings new challenges to the security of communication networks.Introducing quantum secure communication into new network architectures can help solve its security problems.To achieve this goal,the main research contents and research results of this paper are as follows:First,this paper designs a quantum secure communication network architecture based on software-defined networks and network slicing.The network architecture is roughly divided into three parts: application layer,management and orchestration layer,and network layer.The network layer also includes classical network and QKD network.There are two parts,each part is composed of specific function modules and transmission interfaces,and the function of each module and the introduction of interface information are given in detail later.Secondly,based on this network architecture,this paper designs a set of encrypted communication business processes,including the identity authentication,slice establishment,encrypted transmission and resource release processes of encrypted services.The implementation process is described in detail.After that,this paper simulates the encrypted communication process on the SDN simulation platform,simulates the process of establishing slices in the network and the consumption process of quantum key resources,and analyzes the openflow data packet information generated in the communication process to verify The encrypted communication process has certain feasibility.Thirdly,this paper compares and analyzes the queue management algorithms in classical networks,and designs a queue management strategy suitable for quantum secure communication networks on this basis,and gives a flow chart and a description of the implementation process.After that,this paper designs a slice resource allocation model based on linear programming,and through the performance comparison with the shortest path algorithm,it is proved that the model can support more slice requests when the network resources are fixed,and can ensure the fairness of slice resource allocation.Finally,the full text is summarized and the future work is prospected.