To protect PDF when you convert dxf to pdf document, you need to choose a suitable application which has such kind of function. The product of VeryPDF—AutoCAD to PDF Converter can be used to make this kind of conversion and help you protect PDF document with user password and owner password. It can also set four kinds of permissions for the created PDF file.
Download AutoCAD to PDF Converter
Enter the homepage of AutoCAD to PDF Converter
After downloading the application, please install it on your computer and then launch it by double clicking the application icon.
Please see the main interface of the application in Figure 1. For adding dxf document into the application, you can click File in menu bar and click Add files option in popup floating item. Then you can choose dxf file from opened file picker window.
Figure 1
To protect PDF, please click Setting button on the interface of the application to open program setting window in which you need to choose Encrypt Options tab to check the option Encrypt PDF File.
Then you are able to input user password and owner password for the created PDF document in User Password and Master Password edit boxes. You can also set the encryption level for password as 40 or 128-bit. In addition, the encryption permissions can be set as not printing, not copying, not changing document, etc. Then you need to click OK button to save your changes. Please see it in Figure 2.
Figure 2
Click Make PDF button to open the window for saving target file in the popup Save as window in which you are allowed to set target file location and file name. Then please click Save button to run the conversion from dxf to pdf.
Several seconds later, you will get the target files in specified location of your computer and you can freely view it with any kinds of PDF viewer or reader. If you have questions about this conversion, please bring your problems to our support team.