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In this tutorial, you will learn how to lock a PDF file with certificate security in Adobe Acrobat Pro DC. First, open your PDF file in Adobe Acrobat Pro DC and go to the file option, then click on properties. Under the security option, select certificate security and encrypt all document content or metadata. Choose an encryption algorithm and create a digital ID with your name, email address, and password. Save the digital ID and finish the process. Save and open the PDF file, and enter the password to access the locked content. Thank you for watching.
