Curtain e-Locker is an Information Rights Management system that prevents sensitive files from leaking out of the company by any exit channels (e.g. USB hard-disk, CDR, and web mail). By using Curtain e- locker, a company can allow users to access sensitive files. At the same time, the company can control NOT to allow the users to print, save as, or send files to external sources during normal course of daily operations.