It is one of the most reliable PDF file password protection tools available on the market. The advantage also enforces various other security measures on the file. This tool enables users to protect PDF files from editing, copying, and protecting PDF files from any threats that can lead to file misuse. You can password protect PDF files without Acrobat. In addition, you do not need any prior technical knowledge to run this software application. You can also edit metadata and other information in PDF files. All of these different features of the secure PDF software make it the best choice among users.