Operation Manual

219

USING ACROBAT 9 STANDARD

Security

Last updated 9/30/2011

Encrypt a PDF with a certificate

1 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.

2 Choose Advanced > Security > Encrypt With Certificate or click the Secure button in the Tasks toolbar, and

choose Encrypt With Certificate.

3 At the prompt, click Yes.

4 In the Certificate Security Settings dialog box, select the document components to encrypt.

5 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.

6 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.

7 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.