The invention provides a design method and device for vehicle-ground communication encryption in a CBTC (Communication Based Train Control) system, and the method comprises the steps: obtaining a plurality of secret key groups corresponding to target equipment in the CBTC system, and enabling the secret key groups to comprise a plurality of dynamic secret keys; storing a plurality of secret key groups; and under the condition that the target key group in the multiple stored key groups has the remaining available dynamic keys, encrypting/decrypting the data packet corresponding to the target equipment based on the remaining available dynamic keys. According to the design method for vehicle-ground communication encryption in the CBTC system, the dynamic secret key agreed by the vehicle and the ground is set to encrypt/decrypt the data packet in the communication process, effective encryption can be realized on the basis of not using LTE-M communication and not enabling LTE-M to have an air interface encryption measure, the requirement for a wireless communication system is reduced, and the communication efficiency is improved. The method is easy to implement, reduces the number of times of repeated use of the key, and improves the communication safety.
本发明提供一种CBTC系统下车地通信加密的设计方法和装置,所述方法包括:获取CBTC系统中目标设备对应的多组秘钥组,秘钥组包括多个动态秘钥;存储多组秘钥组;在存储的多组秘钥组中目标秘钥组有剩余可用的动态秘钥的情况下,基于剩余可用的动态秘钥对目标设备对应的数据包进行加/解密。本申请的CBTC系统下车地通信加密的设计方法,通过设置车地双方约定的动态秘钥以对通信过程中的数据包进行加/解密,在无需使用LTE‑M通信且无需使LTE‑M具备空口加密措施的基础上即可实现有效加密,既降低了对无线通信系统的要求,易于实现,也减少密钥重复使用次数,提高了通信安全性。
Design method and device for vehicle-ground communication encryption in CBTC (Communication Based Train Control) system
CBTC系统下车地通信加密的设计方法和装置
2022-12-20
Patent
Electronic Resource
Chinese
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