PDF Encrypt is a tool that will allow you to encrypt PDF files with an encryption level of 40 bits, 128 bits or using AES encryption. It also allows, from the program interface, to change the permissions of the PDF, as well as to add new passwords of users associated to said PDF.
A very clear example of the restrictions or permissions that can be applied with PDF Encrypt is the fact that it can be viewed but not printed. You can also limit the actions of copying and pasting texts depending on the user who has opened it at any time. In this way, the security and privacy of the content of each PDF is preserved.
For the correct functioning of PDF Encrypt you do not need to have Adobe Acrobat previously installed. PDF Encrypt can also be executed from the Windows command line, as well as referenced from different programming languages.
You can free download PDF Encrypt 32, 64 bit and safe install the latest trial or new full version for Windows 10 from the official site.