Support for PDF Security OwnerGuard is available from the publisher site.
Short description: PDF Security OwnerGuard is the ultimate Digital Rights Management (DRM), Security, Copy Protection, Licensing and Distribution Management solution for Adobe PDF Documents....
To speed up your downloads we recommend you use a download manager such as 
PDF document security with PDF DRM controls. Stop copying, sharing, modifying, screen grabbing. Control the number of views and prints & when documents expire. No useless pdf password security. Complete PDF copy protection and PDF control.
Password Commander manages and generates secure passwords, sticks them to web pages and programs with ONE click and clicks the "Log in" button for you. The program keeps personal data encrypted, runs from USB-flash and protects data from keyloggers.
High security password manager + AntiKeyLogger + virtual keyboard + CAPTCHA. Easy to use and free. You can create as many fields per entry as you need. File protection and data theft prevention. Portable version.
Secure file shredder with unlimited use of the zero wipe (1 pass) shredding algorithm to erase your files. Has easy drag & drop, quick installer/uninstaller, comprehensive help, & free updates until the next major version release. Portable capable!
Are your data safe?SecuKEEPER is an ALL-IN-ONE file encryption software design to secure your files and folders from prying eyes, which designing four protection method(hide/rapidly lock/encrypt/private coffer). Furthermore offer Password Manager.
Keep those prying eyes out of your communications and prevent unwanted people from reading your private files. Invisible Secrets encrypts and hides data in places where not even your wife, boss, or a hacker would look for sensitive information.