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This article is to share with you about the way of PDF encryption, the editor thinks it is very practical, so I share it with you to learn. I hope you can get something after reading this article.

Nowadays, there are more and more paperless office scenarios, and the application of PDF files is more and more widespread. The emergence of electronic contracts is a very suitable scenario for the application of PDF files. But it also raises the question of how to encrypt PDF. Like these important documents such as contracts, how to ensure the security and reliability of PDF documents is very important.

First of all, let's introduce how to encrypt PDF.

Adobe acrobat official editor Adobe acrobat software has provided us with the way to encrypt PDF files. Select "Advanced"-"Security"-"password encryption" in the menu bar, and the encryption dialog box pops up, where we can set the password to open the document and tick before "require the password to open the document". Click "OK", pop up the confirmation dialog box, enter the password again, and the encryption of the PDF document is complete. Whether the whole process is simple.

So after PDF encryption, is PDF secure? In fact, for PDF documents, the unusurable modification of documents is also important.

We can use digital signature to realize the unusurable modification of PDF documents. We can first apply for the PDF document signing certificate in the agency. How to apply for the PDF document signing certificate, you can contact the customer service staff of this site.

First use Adobe acrobat to open an PDF document, click tools in the menu bar, all the tool plug-ins will appear, and then select Certificate, as shown in the figure.

The Digital signature appears in the toolbar, as shown in the figure.

Drag the mouse in an empty space to drag out the signature Field, and then a window to select a digital certificate will pop up. As shown in the picture

Click "continue"-"sign" and save the signed PDF document. Such a "digitally signed" PDF document is complete.

The signed PDF document cannot be modified. Once the PDF document is modified, the Adobe acrobat software will find it and will display an error to inform the user.

These are the ways of PDF encryption, and the editor believes that there are some knowledge points that we may see or use in our daily work. I hope you can learn more from this article. For more details, please follow the industry information channel.

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