Microsoft Information Rights Management
Information Rights Management (IRM) allows individuals and administrators to specify access permissions to documents, workbooks, and presentations. This helps prevent sensitive information from being printed, forwarded, or copied by unauthorized people. After permission for a file has been restricted by using IRM, the access and usage restrictions are enforced no matter where the information is, because the permission to a file is stored in the document file itself.
IRM helps individuals enforce their personal preferences concerning the transmission of personal or private information. IRM also helps organizations enforce corporate policy governing the control and dissemination of confidential or proprietary information.