Mac Platform: Intel
OS version: OS X 10.6 or later
A bit on the older side (from 2009), but a handy utility nonetheless, and it still works!
More Info: http://www.sybrex.com/products/macgui/protectionmanager/index.php
PDFProtect is a stand-alone, fully automatic software application that can change, add, or remove security level standards in the PDF documents. To change current document encryption settings, simply select the PDF file or folder with PDF files, set new protection options and push the "Start" button. That’s all. The encryption level and security settings are changed automatically.
The program’s features are:
ease of use
40 bit encryption
128 bit ecryption
128 bit AES (Advanced Encryption Security) ecryption
recursive search for PDF documents.
The following permissions can be set for crypted PDF document:
Permit low resolution printing
Permit the PDF document to be modified
Permit content to be copied
Enable adding or modifying annotations
Enable form filling
Support screen reader devices for the visually impaired
Permit high quality printing
The program is a must have tool for every individual or company that works with PDF documents extensively.