Research On End-to-End Quantum Security Service Access In Quantum Metropolitan Area Network

As a new communication method that may have an important impact on the future,quantum communication has attracted more and more attention.It has far more security and efficiency than classical communication methods,making it a considerable development in many fields and application prospects.In recent years,quantum communication has made great progress in both theory and practice,and it can be said that it has gradually moved from ideal to reality.This paper mainly studies the end-to-end key generation strategy and the specific video service access method of the hybrid communication network composed of classical communication and quantum secure communication,and simulates its performance in OPNET.The main works are as follows:1.An end-to-end key generation strategy based on dynamic adjustment in quantum metropolitan area network is proposed.The strategy randomly generates an initial key between the two communicating parties and encrypts and transmits it through the quantum key negotiated between trusted relays.,so as to establish a symmetric end-to-end key.When the key amount accumulates to the set threshold,a call is made.During the call,the key establishment speed is dynamically adjusted so that the end-to-end key can be established as quickly as possible on the premise of ensuring network performance.When the network performance is poor by dynamically adjusting the key expansion coefficient,the network pressure is relieved to ensure the normal communication of the business.Finally,a quantum man network simulation platform that supports classical services and quantum secure communication services is built on the OPNET Modeler simulation software,and the video service access based on the end-to-end key generation strategy is realized.The simulation results show that the proposed method is effective.2.In the case of multi-service concurrency in the quantum metropolitan area network,the quantum router needs to process data packets of various types and priorities accordingly,that is,to process and forward the classic information packets and encrypted service packets of different priorities.The key establishment package needs to be decrypted and then encrypted before being forwarded.A specific priority scheduling strategy is proposed.This strategy divides the router’s input queue into the encryption and decryption part and the processing and forwarding part,that is,when the data packet arrives at the quantum router,it is first judged whether it is a key packet that needs to be encrypted.The processing and forwarding part performs processing and forwarding,otherwise,it directly enters the processing and forwarding part.The processing and forwarding part uses the classic priority queue scheduling algorithm,and for the encryption and decryption part,an improved Priority Queueing strategy is proposed according to the characteristics of quantum key distribution.The simulation results show that the strategy ensures that the key establishment packets of different priority services can be encrypted and decrypted according to the priority without affecting the forwarding function of the quantum router,ensuring differentiated services.