Encrypt PDF 2.3 is a PDF Software product from verypdf.com, get 5 Stars SoftSea Rating, Encrypt PDF program is a very flexible and strong program, Encrypt PDF program allows you to encrypt (using standard 40-bit or 128-bit supported by Acrobat Reader 7.0 and up) 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).

Encrypt PDF (User interface) Features
Easy to use
Do NOT need Adobe Acrobat program
Support Windows 98, ME, NT, 2000, XP, 2003 systems
It's simple to use it like a batch software to set permissions to every PDF in your archive
Password protect opening of the document
Prevent printing of the document
Prevent copying of text/graphics
Prevent changes to the document
Password protection for PDF files with 40 or 128 bit encryption
Support user password and owner password
Support add printing, copying and changing permissions to an encrypted PDF file
Set the document title, subject, author, keywords to a PDF file
Lock your PDF files instantly. Stop sharing, copying and piracy
Support drag and drop
Support Acrobat 7.0 PDF file (PDF 1.6 format)

Encrypt PDF Command Line features
The Encrypt PDF Command Line software provides a regular console interface to Encrypt PDF functionality. It includes all of the features in Encrypt PDF plus: It's simple to use it like a DOS Command Line software
It's simple to use it inside your CGI/ASP/PHP/etc. (Server Side)
Support wildcards (*.pdf) The license of this file & disk software is Free Trial Software, the price is $38.00, you can free download and get a free trial before you buy. If you want to get a full or nolimited version of Encrypt PDF, you can buy this file & disk software.