Adobe Acrobat 8 3D - Manual (Page 275)

268 ADOBE ACROBAT 3D VERSION 8
User Guide
2 Click Change Settings.
3 Do any of the following, and then click Next.
• To encrypt different document components, select that option.
• To change the encryption algorithm, choose it from the menu.
4 Do any of the following:
• To check a recipient’s trusted identity, select the recipient, and then click Details.
• To remove recipients, select one or more recipients, and then click Remove. Do not remove your own certificate
from this list, or you won’t have access to the file using that certificate.
• To change recipients’ permissions, select one or more recipients, and then click Permissions.
5 Click Next, and then click Finish. Click OK to close the Document Properties dialog box, and save the document
to apply your changes.
Remove encryption settings
1 Click the Secure button in the Tasks toolbar, and choose Remove Security.
2 If prompted, type the Permissions password. If you don’t know the Permissions password, contact the author of
the PDF.
Create secure attachments
You can add security to any document by embedding it in an encrypted envelope, called a security envelope (or
eEnvelope, in earlier versions) and sending it as an email attachment. This method is especially useful if you want to
send a secure file attachment without modifying the attached file. When other users open the security envelope, they
can extract the file attachments and save them to disk. The saved files are identical to the original file attachments
and are no longer encrypted when saved.
For example, suppose that you want to send several documents, including non-PDF documents, to your accountant,
but you don’t want anyone else to view the documents. You can embed these documents as file attachments in a
security envelope, encrypt the security envelope so that only your accountant can open the attachments, and then
email the envelope. Anyone can open the envelope, view its cover page, and even view a list of the contents of that
envelope, but only your accountant can view the embedded attachments and extract them to the computer.
When you create a secure attachment, you’re prompted to select or create a security policy.
Embed file attachments in security envelopes for secure transit.
1 Click the Secure button in the Tasks toolbar, and choose Create Security Envelope.
2 Click Add File To Send, select the documents you want to attach, and then click Open. Select any PDFs in the list
that you don’t want to include and click Remove Selected Files.