password protect existing pdf without acrobat

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. The Compatibility option you choose determines the type of encryption used. 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. Select Require a Password to Open the Document, then type the password in the corresponding field. If you receive a prompt, click Yes to change the security. Open the PDF and choose Tools > Protect > Encrypt > Encrypt with Password. 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. Import 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. Go to the location of the PDF that you want to password-protect, then click the PDF in question. It's a link in the red box that's in the middle of the page. It's working fine But it wipe out all the data which is already there in my pdf after i secure pdf using below given code.Ĭode to secure PDF : import If you want to lock the option of editing the PDF with a password, try using PDF2Go instead.

I just goolge it for the same and find a good solution given below. I want to make pdf file password protected.

Password protect existing pdf without acrobat