Adobe InDesign CS3 - Manual (Page 492)

INDESIGN CS3
User Guide
485
Security options for PDFs
You can set the following options when you create a PDF or when you apply password protection to a PDF. Options
vary depending on the Compatibility setting. Security options are not available for PDF/X standards or presets.
Compatibility Sets the type of encryption for opening a password-protected document. The Acrobat 4 (PDF 1.3)
option uses a low encryption level (40-bit RC4), while the other options use a high encryption level (128-bit RC4 or
AES).
Be aware that anyone using an earlier version of Acrobat cannot open a PDF document with a higher compatibility
setting. For example, if you select the Acrobat 7 (PDF 1.6) option, the document cannot be opened in Acrobat 6.0 or
earlier.
Require A Password To Open The Document Select this option to require users to type the password you specify to
open the document.
Document Open Password Specify the password that users must type to open the PDF file.
Note: If you forget a password, there is no way to recover it from the document. It’s a good idea to store passwords in a
separate secure location in case you forget them.
Use A Password To Restrict Printing, Editing And Other Tasks Restricts access to the PDF file’s security settings. If the
file is opened in Adobe Acrobat, the user can view the file but must enter the specified Permissions password in order
to change the file’s Security and Permissions settings. If the file is opened in Illustrator, Adobe Photoshop, or Adobe
InDesign, the user must enter the Permissions password, since it is not possible to open the file in a view-only mode.
Permissions Password Specify a password that is required to change the permissions settings. This option is
available on if the previous option is selected.
Printing Allowed Specifies the level of printing that users are allowed for the PDF document.
• None Prevents users from printing the document.
• Low Resolution (150 dpi) Lets users print at no higher than 150-dpi resolution. Printing may be slower because
each page is printed as a bitmap image. This option is available only if the Compatibility option is set to Acrobat 5
(PDF 1.4) or later.
• High Resolution Lets users print at any resolution, directing high-quality vector output to Adobe PostScript and
other printers that support advanced high-quality printing features.
Changes Allowed Defines which editing actions are allowed in the PDF document.
• None Prevents users from making any changes to the document that are listed in the Changes Allowed menu,
such as filling in form fields and adding comments.
• Inserting, Deleting, And Rotating Pages Lets users insert, delete, and rotate pages, and create bookmarks and
thumbnails. This option is only available for high (128-bit RC4 or AES) encryption.
• Filling In Form Fields And Signing Lets users fill in forms and add digital signatures. This option doesn’t allow
them to add comments or create form fields. This option is only available for high (128-bit RC4 or AES) encryption.
• Commenting, Filling In Form Fields, And Signing Lets users add comments and digital signatures, and fill in
forms. This option doesn’t allow users to move page objects or create form fields.
• Page Layout, Filling in Form Fields, and Signing Lets users insert, rotate, or delete pages and create bookmarks or
thumbnail images, fill out forms, and add digital signatures. This option doesn’t allow them to create form fields. This
option is only available for low (40-bit RC4) encryption.
• Any Except Extracting Pages Lets users edit the document, create and fill in form fields, and add comments and
digital signatures.