3种对称加密算法在无线闭塞中心中的应用研究

Three kinds of symmetric encryption algorithm application in the center of the wireless occlusion

无线闭塞中心(RBC)系统是CTCS-3级列控系统的地面核心设备,CTCS-3级列控系统车地无线通信采用对称的加密算法AES,且所有传输信息均采用明文格式,存在被破解的可能性,因此,为保证CTCS-3级列车运行控制系统车地无线通信的安全,研究新的对称加密技术在轨道交通通信信号领域应用的可行性势在必行。本文对三种对称加密算法TDES、AES和SM4的比较分析,对三种对称加密算法的安全性进行比较研究,通过实验对算法的性能进行比较分析,在PC环境下,对三种加密算法采用各自标准长度的密钥加密和解密,对加密算法加解密效率进行测试。最终给出三种对称加密算法性能和安全性的比较结论。为无线闭塞中心下一步采用新的对称加密算法,并应用到密钥管理中心设备打下了坚实的基础。

Radio Block Center（RBC） is the most important equipment of CTCS-3 level train control system, CTCS-3 train control system using AES in the communication between onboard and RBC, And all the transmission information are in plaintext format ,which may be cracked ,Therefore, in order to ensure the safety of the communication in the CTCS-3 train control system ,it is imperative to study the application of the new encryption technology in the field of railway signaling, in this paper, three kinds of encryption including TDES, AES and SM4 are compared and analyzed, the author compared the security of three kinds of encryption, and analyzed the performance of the algorithms by experiments. Finally, the paper gives the conclusion of comparison among the three kinds of encryption algorithms.