PDF Protection from SysInfoTools is very easy and powerful Windows application to protect PDF file of any version. This tool allows user to encrypt (using standard 40-bit or 128-bit supported by Acrobat Reader 5.0 and up) the existing PDF documents, set permissions, add user and owner password. Easy to use, with highly interactive user interface.
SysInfoTools PDF Protection Description
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Category: Utilities > File Cleanup
OS: Win 95/98/Me/NT/2000/XP/Vista/7