随着铁路系统信息化程度的提高,铁路计算机系统的信息安全保证越来越受到人们的重视,如何有效地保护铁路计算机系统的重要信息数据,提高铁路计算机系统的安全性,已经成为计算机在铁路系统上应用所必须考虑和解决的问题。铁路计算机系统的信息安全主要包括系统安全及数据安全两方面的内容。系统安全一般采用防火墙、病毒查杀、防范等被动措施;而数据安全则主要是指采用现代密码算法对数据进行主动保护,如数据保密、数据完整性、数 With the improvement of railway information system, more and more attention has been paid to the information security of railway computer system. How to effectively protect the important information and data of railway computer system and improve the security of railway computer system has become a hot issue in the field of railway System applications must be considered and solved the problem. Information security of railway computer system mainly includes two aspects of system security and data security. System security generally adopts passive measures such as firewall, virus killing and prevention. Data security mainly refers to the use of modern cryptographic algorithms to proactively protect data such as data security, data integrity,