How to quickly encrypt or decrypt PDF files?


2022-08-04 11:09

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In order to ensure the security of files, we usually add passwords to PDF files. However, many individuals and small partners do not know how to add passwords to PDF files. Today, the editor will share with you the easiest way to add a password to a PDF file. If you are interested, you can take a look.

To add a password to a PDF file, you need to use a special PDF tool. My most commonly used PDF tool is "AmindPDF", which can not only set passwords for PDF opening, PDF printing, and PDF editing and copying, but also Remove the password added in Gold Flash PDF.


Step 1: Download and install the AmindPDF software, and open the PDF file that needs to be encrypted. After the installation is complete, open the software, select the "Protect" button in the menu bar, there will be two buttons "Add Password" and "Remove Password" in the lower corner, click Add Password, the "Password Protection" dialog box will pop up, you can Set the password in the box:

The PDF add password is divided into three modules:

Add PDF document opening password : Set the document opening password. If you want to open this file after setting, you need to enter the opening password first, as shown in the figure below, enter the password and confirm the password in the "Open Password" button, and then click the "OK" button in the lower corner , click save and exit, you need to enter a password to open it again.


Add PDF document permission password: In the permission password, you can also choose the resolution of the printing license, and you can choose the type of modification permission "insert, delete, rotate pages", "fill in the form or digital signature", "annotate the file, fill in the form, digital signature" "," page extraction" modification permission, you can choose different permissions according to your needs, and then enter a password that is different from the opening password in the "permission password" below, then click OK to save, exit and then open, in When modifying the PDF file, you need to enter the password first. 

PDF encryption settings: You can choose the PDF encryption algorithm "RC4 (128bit)", "AES (128bit)", "AES (256bit)", or you can directly click "Do not encrypt metadata;

PDF decryption:

PDF removal password : AmindPDF Editor can remove the password added in AmindPDF Editor, click the "Remove Password" button, the following dialog box will pop up, if you are sure to remove the password, click the "OK" button to remove the password. 

The above is the operation steps to add password and contact password to PDF with AmindPDF. Of course, there are many other ways to add password to PDF file, and the above is just one of them.

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