Dynamic authorization policy of manufacturing grid

In order to ensure the security of the sharing service in the Manufacturing Grid(MG),an dynamic authorization mechanism was presented to realize the automatical adjustment of user's authorized services according to the status of tasks or the relationship between the tasks.The task context is considered as one of the restraint conditions in the dynamic authorization mechanism in the MG like the Task based Access Control(TBAC).The relationships between the tasks are defined according to the characteristic of the Manufacturing Grid task.The rules to authorize the entities to use the services in the task are also defined.A case study was presented to verify this mechanism could enhance the access control of the sharing service in the Manufacturing Grid.