Encrypting files using Adobe Acrobat DC

  1. Open the PDF that you want to encrypt and click on Tools, then Protect, then Encrypt, then Encrypt with password.
  2. If you receive a prompt, click Yes to change the security.
  3. Select Require A Password to Open the Document, then type the password in the corresponding field. For each keystroke, the password strength meter evaluates your password and indicates password strength.

  1. Select an Acrobat version from the Compatibility drop-down menu. Choose a version equal or lower to the version that you are running on your machine. It is recommended to select Adobe X and Later as this will encrypt your document using 256-bit AES.

  1. Select an encryption option:
  • Encrypt all document contents — encrypts the document and the document metadata. If this option is selected, search engines cannot access the document metadata
  • Encrypt all document contents  — encrypts the contents of a document but still allows search engines access to the document meta data
  • Encrypt only file attachments — requires a password to open file attachments. You can open the document without a password.
  1. Click OK. At the prompt to confirm the password, retype the appropriate password in the box and click OK.

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