PDF Encryption dialog box

In this dialog box you can set encryption parameters of the PDF file during export.

Option	Description
Type	Select the encryption type and key length from the following values: 40-bit RC4 (PDF 1.4 and above) 128-bit RC4 (PDF 1.4 and above) 128-bit AES (PDF 1.6 and above) 256-bit AES (PDF 1.7 and above) PDF version on Format settings dialog box PDF tab limits the list of values available here. In case of 40-bit RC4 encryption, only Print in high resolution is supported.
Owner password	Enter owner password. Opening the document with the correct owner password (assuming it is not the same as the user password) allows full (owner) access to the document. This unlimited access includes the ability to change the document's passwords and access permissions.
Via RRT	Select this check box to obtain the owner password from an RRT. Enter the password RRT in the text box that is enabled by this check box. If you are entering owner or user password in Via RRT text box, this password is not encrypted.
User password	Enter user password. Opening the document with the correct user password (or opening a document that does not have a user password) allows additional operations to be performed according to the user access permissions specified in the Permissions group.
Via RRT	Select this check box to obtain user password via RRT. Enter the password RRT in the text box that becomes enabled. If you are entering owner or user password in Via RRT text box, this password is not encrypted.

Permissions group allows you to specify the user access permissions. The following permissions may be set:

Option	Description
Add notations	Adding or modifying text annotations and interactive form fields. In this case "Commenting" and "Form field Fill-in or Signing" security properties of the output file are ON.
Assemble document	Assembling the document: inserting, rotating, or deleting pages and creating navigation elements such as bookmarks or thumbnail images.
Extract text and graphics	Copying or otherwise extracting text and graphics from the document. In this case "Content copying or Extraction" and "Content Accessibility Enabled" security properties of the output file are ON.
Fill form fields	Filling out forms (that is, filling out existing interactive form fields) and signing the document (which amounts to filling out existing signature fields, a type of interactive form field). In this case "Form field Fill-in or Signing" security property of the output file is ON.
Modify content	Modifying the contents of the document. In this case "Changing the document" and "Document assembly" security properties of the output file are ON.
Print	Printing the document.
Print in high resolution	Printing to a representation from which a faithful digital copy of the PDF content could be generated. Disallowing such printing may result in degradation of output quality. This permission may be set only when the Print permission is selected.