Please refer to Adobe Acrobat’s website for more details. At the prompt to confirm the password, retype the appropriate password in the box and click OK. To apply 256-bit AES encryption to documents created in Acrobat 8 and 9, select Acrobat X And Later.Ĭlick OK. Acrobat X And Later (PDF 1.7) encrypts the document using 256-bit AES.Acrobat 7.0 And Later (PDF 1.6) encrypts the document using the AES encryption algorithm with a 128-bit key size.Acrobat 6.0 And Later (PDF 1.5) encrypts the document using 128-bit RC4.For example, Acrobat 7 cannot open a PDF encrypted for Acrobat X and later. It is important to choose a version compatible with the recipient's version of Acrobat or Reader. View, sign, collaborate on and annotate PDF files with our free Acrobat Reader software. The Compatibility option you choose determines the type of encryption used. Adobe Acrobat Reader The best PDF viewer just got better. Choose a version equal to or lower than the recipients’ version of Acrobat or Reader. Select an Acrobat version from the Compatibility drop-down menu. For each keystroke, the password strength meter evaluates your password and indicates the password strength. With Acrobat DC, ongoing updates are included so you always have the newest version of Acrobat software with the latest product innovations and a complete set of tools for desktop and mobile use. Select Require a Password to Open the Document, then type the password in the corresponding field. Acrobat DC 2020 is the current subscription version of Acrobat. If you receive a prompt, click Yes to change the security. Once everything is closed, open the PDF again using Adobe Acrobat. Close all relevant tasks one by one, then close the main program. To end the process, right-click on it and select End task. Open the PDF and choose Tools > Protect > Encrypt > Encrypt with Password. Right-click on the Windows Start button and select Task Manager. Please refer to Microsoft Office support website for more details. Each time you open the document, you will be prompted to enter your password to access its contents. Microsoft Word will now indicate the document is protected. Click Encrypt with Password.Įnter the password again to confirm it and click OK. Click the File menu, select the Info tab, and then select the Protect Document button. The procedure is standard for most Office applications, so for this example, we will use Microsoft Word 2016.įirst, open the Office document you would like to protect.
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