Research on security service of PDM system based on Web

PDM is a new information management concept and technology for the enterprise to man-age product data.Propelled by the development of the information technology and net-worked manufacturing,the concept of the PDM is extended and the system is expanded to the distribution,which bring more severe security problems to the PDM system.We analysis the security problems of the PDM system which implemented in the Virtual Enterprises or Dynamic Alliance,and present the detailed security requirements based on the analysis of the shortcoming of the current PDM security.We also present the enhanced security services for the internet based PDM system.The approach of the authentication and authorization for the PDM in the virtual enterprise is also proposed in the end.