PDF Security Settings

When you save a recognized text in PDF format, you can protect the contents of the PDF-document:

  1. With a password required to open the document
  2. With a password required to modify or print the document or copy information to another application
  3. With encoding

Passwords and other PDF security parameters are set in the PDF Security Settings dialog box.

To open it, click the PDF Security Settings… button located on the bottom of the Save>PDF tab of the Options dialog box (Tools>Options…).

Password for opening the document Password for editing and printing the document Encoding level
 

This password protects the PDF-document from unauthorized opening. The user will be able to open the document only after entering the password specified by the author.

To set a password required to open the document:

  1. Select Require password to open document
  2. Click
  3. In the Enter Document Open Password dialogue box, enter your password and confirm it.

The password you specified will be displayed as dots in the Document Open Password field of the PDF Security Settings dialogue box.

This password protects the PDF-document from unauthorized editing and printing as well as copying information to another application. The user will be able to do the described action only after entering the password specified by the author.

To set a password required to access file contents:

  1. Select Restrict printing and editing the document and its security settings
  2. Click
  3. In the Enter Permissions Password dialogue box, enter your password and confirm it.

The password you specified will be displayed as dots in the Permissions Password field of the PDF Security Settings dialogue box.

Next, select the actions you want to allow the users to do with the PDF-document. These restrictions are set in the Permissions settings group.

  • Items in the Printing allowed drop-down list let you allow or prohibit document printing.
  • Items in the Changes allowed drop-down list let you allow or prohibit document editing.
  • If the Enable copying text, pictures, and other content option is selected, the user will be able to copy the contents of the PDF-document (text and images) to Clipboard. If you want to prohibit such actions, make sure this option is clear.
  • If the Enable text access for screen reader devices option is selected, the user will be able to make screenshots of the opened PDF-document. If you want to prohibit such actions, make sure this option is clear. Note that this option is only available for PDF-documents with128-bit encoding or higher.

Items in the Encryption level drop-down list let you set the encoding type for the password-protected PDF-document.

Select one of the encoding levels:

  • Low (40 bit) - compatible with Adobe Acrobat 3.0 and above sets a low 40-bit encoding level based on the RC4 standard.
  • High (128 bit) - compatible with Adobe Acrobat 5.0 and above sets a high 128-bit encoding level based on the RC4 standard, but the users of earlier Adobe Acrobat versions will not be able to open such PDF-document.
  • High (128-bit AES) - compatible with Adobe Acrobat 7.0 and above sets a high 128-bit encoding level based on the AES standard, but the users of earlier Adobe Acrobat versions will not be able to open such PDF-document.