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In this tutorial, Kumar demonstrates how to encrypt a PDF file using Adobe Acrobat Pro. First, you need to install Adobe Acrobat Pro on your system. Then, open the PDF file in Acrobat Pro and go to file properties. Select password security to set a password for the document. You can also apply restrictions for printing, copying, and changes, all requiring the password to access. This ensures that only authorized users can view and make changes to the encrypted PDF file.
