Hi When you try to export secured PDF with the help of Adobe Acrobat pro then you will encounter with the following error message in which you will be requested to enter the permission password. If you know it then you can easily convert the secured PDF document into word format by Adobe Acrobat Pro. But if in case you have lost or forgotten the permission password then you can use the professional software i.e. SysTools PDF Unlocker Software . With this software you can remove security from PDF document without entering the permission password. Moreover once you have successfully removed the PDF file security you can convert it into word document with the help of an online tool. To know theplete process of removing PDF security watch this video s