In fact, there are many ways to encrypt PDF files, and the key is to determine how much encryption is necessary.

How are PDFs encrypted?In fact, there are many ways to encrypt PDF files, merge 2 jpg files into 1 pdf and the key is to determine how much encryption is necess...

Oct 13,2023 | Linda

How are PDFs encrypted?

In fact, there are many ways to encrypt PDF files, merge 2 jpg files into 1 pdf and the key is to determine how much encryption is necessary.

As an example, I might want to encrypt part of the data, delete part of the text, or encrypt the entire PDF file so that no one can open it.

I have shared three kinds of PDF document encryption methods above, which should be the most comprehensive PDF document encryption available.

The basic version of encryption technology is No.1

"Ciphertext" function tutorial in PDF

You need to share PDF courseware and PDF reports, but you don't want the core information to leak out. What should you do?

As of right now, we must use PDF software's "ciphertext" function, which hides sensitive information and encrypts it to prevent data leakage.

Encryption function for PDF documents

Using PDF as an example, the following demonstrates ciphertext operation:

Open the PDF file by dragging it directly into the software you have installed.

Under the Protect option, mark the encrypted text area as shown below.

As soon as you click "Apply ciphertext", you can distribute the encrypted document to others.

View PDF document encryption by clicking here

Marking the range is as easy as selecting the text area to mark as ciphertext in the above step.

The marked regional economy will then be covered in black, and no one else will be able to see it. The specific teaching effect is shown in the figure below.

If you don't like black, you can select the area, right click, select Properties, and change the mosaic cover color.

The PDF encryption effect can be viewed by clicking here.

A PDF [encrypted text] is protected by encryption, which prevents other people from seeing the hidden content and from modifying it.

The second type of encryption is advanced version encryption

An erasing function design tutorial in PDF format

You might want to make PDF documents prettier if you're uncomfortable with encrypting documents.

To avoid information leakage, you should use the PDF erase function to directly erase important data and preserve the beauty of PDF.

View the features of PDF erase technology by clicking here

As a PDF document, long press the mouse, select the area to be erased, and click "erase" to erase the data.

View the PDF erase technology effect by clicking here

In the image above, you can see how clean the erased PDF document is.

The box selection function here not only erases the information, but also copies the selected text into the picture /u002Ftext.

Method for high-level encryption

Course on PDF Document Bulk Encryption

It is recommended to use batch Mosaic functions if your PDF document can be large, containing many management page data that needs to be covered. Mosaicing or erasing each management page individually will waste a lot of time.

Mosaic function for PDF batches

You can mark Experience as ciphertext by clicking the Search and Mark Ciphertext option under the Protect option.

Mosaic function for PDF batches

The PDF will automatically retrieve all words related to "experience" when you click the Search button.

Check the box on the left before marking a word as encrypted text, and then click Apply all encrypted text tags to block all similar words.

Mosaic function for PDF batches

How easy and fast is it to follow the above steps?

PDF watermarks edit PDF files Excel