Excel Document Protector - Version 4.0 Encrypt your excel document,support xls,csv,xlw,xlsx;Protect the distribution of your excel document,No editing,No copying,No printing,stronger than the MS office's own encryption. You can choose encryption mode :¡ú Non-binding -- All computer,One password. (Use "Create Read Password" function to create read password, Enter "No limit" as Machine ID)¡ú PC-binding -- One computer,One password,you only need to encrypt files one time. (Use"Create Read Password" function to create read password)¡ú Excel2EXE -- Convert excel to exe,prevent copying,prevent editing,prevent printing. FAQ:How do I know the machine ID of the user's computer?