PDFs are encrypted in what way?

There are many ways to encrypt PDF files, merge png to pdf ilovepdf but the key is to determine how much encryption is needed.

I can encrypt only part of the data, delete part of the text, or encrypt the entire PDF file.

This is a complete list of PDF file encryption methods, which I shared in the three angles above.

Encryption starts with the basics.

Using the "Ciphertext" function in a PDF document

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

In our next step, we will use the PDF software's "Encryption" function to hide and encrypt sensitive information.

PDF document encryption

The following is an example of ciphertext operation using PDF:

Open the PDF by dragging and dropping it into the software.

Mark the encrypted text area under the Protection option by clicking Mark as encrypted text.

By clicking "Apply encrypted text", you can share the encrypted file with others.

Click here to view PDF document encryption.

The process of marking a range as ciphertext is as simple as selecting a text area.

The marked regional economy will be covered in black after completion, and others will be unable to see it.

If you don't like black, you can choose area, right-click, and select properties.

Click here to view PDF's encryption effect.

By using encryption technology, PDF files [encrypted text ] cannot be modified or viewed by others.

Advanced encryption is the second method of encryption

Using a PDF document to erase a tutorial on function design

In private correspondence, fans have expressed their desire to make PDF documents more beautiful.

For a good-looking PDF, it is recommended to use the PDF eraser function to directly erase important data.

Click here to learn more about PDF erasure technology.

A PDF file can be erased by long-clicking the mouse, selecting the area to be erased, and clicking "Erase".

Click here to see the effect of PDF erasure technology.

The image above shows that the erased PDF document is so clean that no one will notice it.

By selecting the box here, you can not only erase the information, but also copy the selected text into the picture/text.

Encryption method at a high level

Bulk encryption of PDF files course

It is recommended to use the batch mosaic function if your PDF document is very large and you need to overwrite many management pages.

Batch mosaic function for PDFs

Click search and mark ciphertext in the protect option, and then enter the word you want to mark as ciphertext.

A mosaic function for batch PDF files

When you click the search button, the PDF will automatically retrieve all the words related to "experience".

Before marking a word as encrypted text, check the check box on the left to block all similar words.

Batch mosaic function for PDFs

Is it easy and quick to follow the above steps?