How to bypass a PDF password
I created a PDF document of around 2MB file size and then went to Protection. Added both password to open and edit, both with 256-Bit AES. Saved the file with a 25 characters password.
Now I Googled this "How to bypass a PDF Password", the third link is this "https://smallpdf.com/unlock-pdf".
I dropped the encrypted file into the slot provided. assuming that it cant ***** it.
But unfortunately the password was cracked both from the opening and editing end.
I find this very disturbing !
Kindly check this and let me know how to ensure that a password protected PDF not be cracked.
The file I is a Non-Disclosure Agreement (NDA) file so I wont be able to share it here.
It would be great if you could help me out to understand how to ensure such a thing does not happen.

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James Luther commented
If your PDF file is password-locked and entering the password every time is annoying, I would like to suggest a simple tool, Softaken PDF Password Remover. I have used it myself, and it really works. You just have to upload the file and enter the password to unlock it. Then you can access the PDF without the password. No data loss, no complications.
User-friendly
Fast process
100% safe (if you are the owner of the file).Read More:- https://www.softaken.com/recovery/pdf-password-recovery/