PDF Secure SA software automates the process of password protecting pdfs, encrypting pdfs, adding permissions, batch list processing support included up to 2 billion files, Save and load lists of files to process, Optional Random password generation, quick and easy to use interface.
Includes Encrypt RC 40 bit and RC 128 bit support.
All permission levels that are available in Acrobat can be set:-Disallow all permissions Disallow all print permissions
Disallow print permissions except low quality print
Disallow changing the document
Disallow document Assembly (also must include changing the document)
Disallow content copying or extraction
Disallow content extraction for accessibility (also must include content copying or extraction)
Disallow commenting (also must include filling of form fields)
Disallow filling of form fields (also must include commenting & changing the document)
Disallow signing (also must include filling of form fields, commenting & changing the document)
Disallow creation of template pages (also must include changing the document & filling of form fields)
NOTE: SA version is standalone i.e. Adobe Acrobat is NOT required. All future updates to v1.xx version are free of charge.
Evaluation Restrictions are:- Nag Popup, -trialmode added on passwords and max 10 files in batch mode

Main Features
1. Supports Windows 95, 98, ME, NT4, Windows 2000 (NT5), XP, Vista, 2003, 2008 & Windows 7
2. Automates the process of password protecting pdf's
3. Add permissions to pdfs
4. batch list processing support included up to 2 billion files
5. Optional Random password generation
6. Quick and easy to use interface
7. Doesn't require Acrobat
12. Load and Save settings for later use
13. Installer
14. Full HTML & PDF Help

The license of this software is Free Trial Software, the price is $29.95, you can free download and get a free trial.