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Encrypt a PDF with a certificate
- For a single PDF or a component PDF in a PDF Portfolio,
open the PDF. For a PDF Portfolio, open the PDF Portfolio and choose
View > Portfolio > Cover Sheet.
- Choose Advanced > Security > Encrypt With Certificate
or click the Secure button
 in
the Tasks toolbar, and choose Encrypt With Certificate.
- At the prompt, click Yes.
- In the Certificate Security Settings dialog box, select
the document components to encrypt.
- From the Encryption Algorithm menu, choose a rate of
encryption, and then click Next.
The encryption algorithm and key size are version specific.
Recipients must have the corresponding version (or later) of Acrobat
or Reader to decrypt and read the document.
If you select 128-bit AES, recipients must
have Adobe Acrobat 7.0 or later or Adobe Reader 7.0 or later to
open the document.
If you select 256-bit AES, Adobe Acrobat 9 or later
or Adobe Reader 9 or later is required to open the document.
- Create
a recipient list for the encrypted PDF. Always include your own
certificate in the recipient list so that you are later able to
open the document.
Click Search to locate identities in a
directory server or in your list of trusted identities.
Click Browse to locate the file that contains certificates
of trusted identities.
To set printing and editing restrictions for the
document, select recipients from the list, and then click Permissions.
- Click Next to review your settings, and then click Finish.
When a recipient opens the PDF, the security settings you
specified for that person are used.
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