基于TAX18平台的接入鉴权技术研究

Research on Access Authentication Technology Based on TAX18 Platform

机车安全信息综合监测装置为机车众多车载监测设备提供了统一的机车安全信息。随着铁路智能化的深入发展,人们对机车安全信息综合监测装置数据的安全性要求日益提高。缺乏对机车安全信息综合监测装置有效的管控手段,会导致外围设备非法接入,造成通信总线被干扰。针对机车安全信息综合监测装置存在的问题,基于TAX18平台开展接入鉴权技术研究,提出了一套技术解决方案。在硬件上构建新的RS485通信总线架构,在软件上采用数据包传输层安全性协议(Datagram Transport Layer Security,DTLS)、mbedTLS等技术,实现机车安全信息综合监测装置相关外设的鉴权加密。应用的嵌入式领域加解密库具有较高的稳定性和可靠性,可从根本上解决外设接入问题,保障机车安全信息综合监测装置通信的可靠性和数据的安全性。

Comprehensive Supervisor for Locomotive Safety Information provides a unified many locomotive vehicle monitoring equipment of the locomotive safety information,with intelligence and in-depth development of the railway,the peripheral equipment of Comprehensive Supervisor for Locomotive Safety Information data security requirement is increasing day by day,and each unit using Comprehensive Supervisor for Locomotive Safety Information is a lack of effective means of control,lead to illegal access to peripheral equipment,communication bus was caused by interference.Aiming at the existing problems of Comprehensive Supervisor for Locomotive Safety Information,this paper studies access authentication technology based on the new TAX18 platform,proposes a set of technical solutions,constructs a new RS485 communication bus architecture on the hardware,and implements encryption authentication of TAX-related peripherals using encrypted Datagram Transport Layer Security(DTLS),mbedTLS and other technologies on the software.Using mature encryption and decryption library based on embedded domain,it has high stability and reliability,fundamentally solves the problem of peripheral access,and ensures the reliability of Comprehensive Supervisor for Locomotive Safety Information communication and data security.