1

Before encryption, you can look at the file properties, menu bar, file, properties and security tabs as shown in the figure below.

2

From the menu bar, select Advanced, Security, and Password Encryption.

three

Check "Password required to open the document" and click "OK", a confirmation dialog box will pop up, enter the password again, and then save.

Password settings that restrict file editing and printing.

1

From the menu bar, select Advanced, Security, and Password Encryption.

2

Modify the page as shown, and click OK.

three

After unchecking the checkbox "Enable Text Aids for Screen Readers with Poor Vision", the following dialog box will pop up. Just click OK and a confirmation dialog box will pop up. Enter the password to be set again, confirm and save, and the encryption is completed.

Digital certificate encryption

1

On the menu bar, click Security Settings under Advanced.

2

Select "add ID"

three

Choose to create a self-signed digital ID for Acrobat.

four

Select "New PKCS# 12 Digital ID File"

five

Set the relevant information. If there is Chinese content, please check the "Enable Unicode Support" option.

six

Click "Finish" to create the digital certificate.

seven

Please do the following

eight

Below is a preview of the current permissions for this document. If you want to change it, you can click "Allow".

nine

Click OK in the pop-up dialog box.

10

Just do the following.