This software is a very flexible and powerful program, PDF Encrypt software allows you to encrypt (using standard 40-bit or 128-bit or AES encryption) existing PDFs, set permissions, add user and owner password. For example you can encrypt a PDF without to allow to print it. The button to print the file will be disabled in Acrobat Reader application, you also can encrypt a PDF allowing the user to read it only if he know the correct password. Note, The source PDF must be an unencrypted PDF. Acrobat Reader will show a key in the bottom status bar if the PDF is encrypted. There two passwords you can apply to a PDF. The first is the owner password. Opening a PDF with this password will allow you full access to the PDF when a user password has been assigned as well. This means that even if printing was disabled you will still be able to print the PDF when using this password. No password will be prompted for when opening the PDF if you secure it with only an owner password. The second is the user password. Opening a PDF with this password will restrict you based on how the PDF was password protected (printing may be disabled, for instance).

Features :

Supports Adobe Standard 40-bit Encryption and Adobe Advanced 128-bit Encryption.
Supports AES encryption.
Password protect opening of the document.
Supports user password and owner password.
Prevent printing of the document.
Prevent copying of text/graphics.
Prevent changes to the document.
Supports add printing, copying and changing permissions to an encrypted PDF file.
It can simple to use like a batch application to set permissions to every PDF in your archive.
Set the document title, subject, author, keywords, creator to the encrypted PDF file(s).
Supports command line operation (for manual use or inclusion in scripts).
Batch operation on many files from command line and windows version.
Easy to use.
Does NOT need Adobe Acrobat software.
The speed of encryption is very fast.
Supports PDF1.6 protocol (Acrobat 8.x).

Platform: Windows 98, Windows Me, Windows NT, Windows 2000, Windows XP, Windows 2003, Windows Vista

System Requirements: There is no specific requirements