Adobe Illustrator CS4 - Manual (Page 297)

290 USING ADOBE ILLUSTRATOR CS4
Importing, exporting, and saving
Adding security to PDF files
When saving as PDF, you can add password protection and security restrictions, limiting not only who can open the
file, but also who can copy or extract contents, print the document, and more.
A PDF file can require passwords to open a document (document open password) and to change security settings
(permissions password). If you set any security restrictions in your file, you should set both passwords; otherwise,
anyone who opens the file could remove the restrictions. If a file is opened with a permissions password, the security
restrictions are temporarily disabled.
The RC4 method of security from RSA Corporation is used to password-protect PDF files. Depending on the
Compatibility setting (in the General category), the encryption level will be high or low.
Note: Adobe PDF presets don’t support passwords and security settings. If you select passwords and security settings in
the Export Adobe PDF dialog box, and then click Save Preset, the passwords and security settings won’t be preserved.
Security options
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. Acrobat 6 and later lets you
enable metadata for searching.
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 8 option, the document cannot be opened in Acrobat 6.0 or earlier.
Require 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 Editing Security And Permissions Settings 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, Photoshop,
or 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
only 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 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.