Password security options
The following security options are located in the Password Security dialog box. These
options also appear if you change security options while using Acrobat Distiller to create a
PDF document. Many of these options are available when you create security policies.
Set the type of encryption for opening a password-protected document. The Acrobat 3.0
And Later option uses a low encryption level (40-bit RC4), while the other options use a
high encryption level (128-bit RC4). Acrobat 6.0 And Later lets you enable metadata for
searching. Acrobat 7.0 And Later lets you enable metadata for searching and encrypt only
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 Acrobat 7.0 And Later
compatibility for a document's security setting, the document cannot be opened in Acrobat
6.0 or earlier.
Encrypt All Document Contents
Select this option to encrypt the document and the document metadata. If this option is
selected, search engines cannot access the document metadata.
Encrypt All Document Contents Except Metadata
Select this option to encrypt the contents of a document but still allow search engines
access to the document metadata. (For details on adding metadata to a document, see
Editing document metadata.)
Encrypt Only File Attachments
Select this option to require a password for users to open file attachments. However, users
can open the document without a password.
Require A Password To Open The Document
Select this option and type a password in the Document Open Password box to prevent
users from opening the document unless they type the password you specify. This option
is unavailable if the Encrypt Only File Attachments option is selected.
Document Open Password
Specify a password to help prevent users from opening the document (or document
attachments) unless they type the password you specify. This option isn't available when
Encrypt Only File Attachments is selected.
File Attachments Open Password
Specify a password to help prevent users from opening the document attachments unless
they type the password you specify. This option appears only when Encrypt Only File
Attachments is also selected.
Select the Use Permissions Password To Restrict Editing Of Security Settings option, and
specify a Permissions password to restrict users from printing and editing. Users cannot
change these security settings unless they type the Permissions password that you specify.
You cannot use the same password used for the Document Open password.
Specify the quality of printing for the PDF document:
Not Allowed prevents users from printing the document.
Low Resolution lets users print the document 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 5.0 And Later or a later
High Resolution lets users print at any resolution, directing high-quality vector output to
PostScript and other printers that support advanced high-quality printing features.
Define which editing actions are allowed in the PDF document:
None prevents the user 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, as well
as create bookmarks and thumbnail pages. This option is available only if a high
encryption level is selected.
Fill-in Form Fields And Signing lets users fill in forms and add digital signatures, as well
as allowing the actions in the previous option. This option doesn't allow users to add
comments or create form fields. This option is available only if the Compatibility option is
set to Acrobat 5.0 And Later or a later Acrobat version.
Commenting, Filling In Form Fields, And Signing lets users fill in forms and add digital
signatures and comments.
Any Except Extracting Pages lets users change the document using any method listed in
the Changes Allowed menu.
Enable Copying Of Text, Images, And Other Content
Lets users select and copy the contents of the PDF document. It also lets utilities that need
access to the contents of a PDF file, such as Acrobat Catalog, get to those contents. This
option is available only if the Compatibility option is set to Acrobat 5.0 And Later or a
later Acrobat version.
Enable Copying Of Text, Images, And Other Content And Access For The Visually
Lets visually impaired users use screen readers to read the document's contents. Users can
also copy and extract information from the document. This option is available only if
Compatibility is set to Acrobat 3.0 And Later.
Enable Text Access For Screen Reader Devices For The Visually Impaired
Lets visually impaired users read the document with screen readers. This option doesn't
allow users to copy or extract the document's contents. This option is available only if the
Compatibility option is set to Acrobat 5.0 And Later or a later Acrobat version.