Electronic document safety distribution controlling method based on task stream

A workflow-bases electronic file resource security distribution control method, belonging to the technical field of the workflow information security, the method refers to the ODRL standard, brings forward the FARO circulation resource right object under the workflow environment, introducing the definition concerning the digital content protection in ODRL to the flow definition language XPDL into the workflow for expanding the XPDL, thereby the expanded XPDL supports the copyright protection on the digital content in the workflow, and supports the safety control of the circulatory file resource by encapsulating the right, in this way, the security of the digital content circulated in the workflow is ensured. The invention has the advantage of that the circulatory file in the workflow has a high security.