Yes, PDF files are great.
They bring security in the different kinds of passwords protecting your file and are widely known.
With a PDF file, you can limit the access other people have to your file.
Only those people who you allow will be able to view or modify your file.
This ability of the PDF file with its passwords, obviously, can put your mind at ease to know that no one will be messing with your precious files.
But what if you lose the passwords to your precious files? What if they are somehow destroyed? If that happens, then you will need to know just how to recover those lost passwords.
You should know what a good password recovery program is so that if one of your passwords is ever lost, you will be able to remain calm and recover the password quickly and easily.
A good password recovery program should have a few vital attributes.

1. It should not be confusing; it should have easy instructions on how to install and use it.
   
2. It should WORK, decoding the password actively.
   
3. If necessary, the program should have the ability to take away all the restrictions and limitations set on the PDF file by the password.
   This includes restrictions to copying or modifying or printing.
   

As long as you follow those rules, getting a good password recovery program should be a breeze.
So do not panic when tragedy strikes and you lose your password; all you need is a good recovery program!