Research of Access Control Model in Product Lifecycle Management

Requirements, key issues, and related works of data access control are introduced, and key elements and their interaction in data access control are analyzed in the paper. L-RBAC model is put forward based on lifecycle status of the product data and roles of the accessing user. After comparing push mode and pull mode in L-RBAC model, a permission calculation algorithm is given. L-RBAC model is implemented in a PDM project of an automobile company, as an example to testify the effectiveness of the model.