Application Analysis of Quantum Secure Communication Based on BB84 Protocol in Urban Rail Transit

Abstract

Objective Critical information systems in URT (urban rail transit) usually use classical cryptographic algorithms for data encryption. The development of quantum information science poses a significant threat to the security of classical cryptography. Therefore, it is necessary to study the application of quantum secure communication in URT context. Method The basic principles of quantum secure communication and the quantum key distribution principle based on the BB84 protocol are introduced. Based on the distribution process of the BB84 protocol, the basic structure of URT quantum secure communication is constructed. The generation process is illustrated with examples in scenarios with and without monitoring. Two network schemes suitable for URT quantum secure communication are proposed, and issues to be considered in the application of quantum secure communication in URT scenarios are analyzed. Result & Conclusion The quantum secure communication system based on the BB84 protocol is suitable for encrypting data in URT critical information systems. When applying this technology to URT, the choice between decentralized and centralized encryption methods should be determined based on the data traffic and flow direction of the encrypted systems. Attention should be focused on the code rate, device reliability, and robustness of the quantum secure communication system.

Keywords

• urban rail transit
• quantum secure communication
• quantum key distribution
• network information security