How are PDFs encrypted?

The key to encrypting a PDF file is to determine how much encryption you need.

In some cases, I just want to encrypt part of the data, convert word to pdf without losing formatting or delete part of the text, or encrypt the whole PDF file so that nobody can open it.

I have shared three PDF file encryption methods above, which should provide the most complete PDF file encryption information ~

The basic version of encryption technology is first.

Tutorial on the "Ciphertext" function in PDF documents

What should I do when I need to share PDF courseware and PDF reports, online pdf converter merge compress but I don't want the core information to leak out?

In this case, we must use the PDF software's "Encryption" function, which hides and encrypts sensitive information to prevent data leaks.

Encryption function for PDF documents

To demonstrate the ciphertext operation method, pdf to word converter free download for windows 7 here is an example using PDF:

Open the PDF file by dragging and dropping it directly into the software after installing it.

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

After clicking "Apply ciphertext", you can distribute the encrypted document.

View PDF document encryption by clicking here

Marking a range is as simple as selecting a text area to mark as ciphertext in the above steps.

Below is a figure showing the specific teaching effect after the marked regional economy is covered in black.

If you don't like black, you can select the area, right-click, select Properties, and set the Mosaic cover color.

View PDF's encryption effect by clicking here.

PDFs are characterized by encryption technology, which ensures that other people cannot see or modify the hidden content.

The second method is the advanced version encryption

An erasing function design tutorial in PDF format

Whether you want to make PDF documents more beautiful, or if you are uncomfortable with encrypted documents.

To prevent information leakage, it is recommended that you use the PDF eraser function to directly erase important data.

View PDF erasure technology features by clicking here.

Take PDF as an example, long-click the mouse, select the area to erase, click "Erase", and the information is erased.

View the effect of PDF erasure technology by clicking here.

This image shows how clean the erased PDF document is, so no one will be able to tell it's been erased.

Additionally, the box selection function here can copy the selected text into the picture / ////u002Ftext information as well as erase the information.

Method of high-level encryption

Bulk encryption of PDF documents

You should use the batch mosaic function if your PDF document is very large, and the data of many management pages need to be overwritten.

Mosaic function for PDF batches

In the protect option, click search and mark ciphertext, and then type in the search box the word you want to mark as ciphertext.

Mosaic function for PDF batches

The PDF will automatically retrieve all the words about the experience when you click the search button.

Click Apply all encrypted text tags to block all similar words before marking a word as encrypted text.

Mosaic function for PDF batches

How easy and fast are these steps to follow?