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            <div class="InDesign"><table><tr><td class="banner">InDesign CS4</td><td class="pod"><img src="images/PDF.gif" width="16" height="16" hspace="15" valign="50%" />&#160;&#160;
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                <h1>
                    Adding security to PDF files
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                <div><p>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. </p>
<p>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.</p>
<p>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.</p>
<div class="note"><span class="notetitle">Note:  </span>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.</div>
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