This is not backed by encryption and is therefore easy to bypass or remove.
The permissions password: is set independently to the open one and is what enforces the copy-paste, editing, form filling, and printing restrictions.See how to open a password protected PDF for further info. Adding one creates an encrypted PDF, and attackers must break the encryption or guess the password to access the document. The open password: controls access to the document itself.When you password protect a PDF there are two types of passwords you can use: the open password and the permissions password: It is possible and even easy to edit a PDF without knowing its password. In the world of PDF security, however, the landscape is very different. This is generally how it works with websites, with users typically needing to go through a reset process. Those who use passwords in their day-to-day life will be used to the simple idea that if you don’t have the password to something, you are out of luck.
