Abstract: In view of the standpoints of data encryption and intrusion detection of the PDM system, This paper analyzes the information security systematically introduces security architecture and presents security strategy about running and maintaining the PDM system via software engineering methods. The emphasis is how to design the architecture for protecting the valuable data and preventing the system from intruding in order to insure the PDM system running safely and efficiently and thereby improving the security level of the PDM system.

Key words: PDM, Encryption, Decryption, Virtual private network, Intrusion Detection, Security Architecture

摘要： 运用了软件工程的方法和观点，从数据加密防护和阻止系统入侵两个不同的角度，对PDM系统的信息安全问题进行了系统的剖析，建立起PDM系统软件设计的安全架构，提出PDM系统运行和维护的安全策略，重点讨论在确保PDM系统安全和高效运行的前提下，如何设计安全的系统架构来保护数据的安全和防止系统入侵，从而提高PDM系统的安全级别。

关键词: PDM, 加密, 解密, 虚拟专用网, 入侵检测, 安全架构