Adobe Acrobat 9 PRO Extended - Manual (Page 259)

253 USING ACROBAT 9 PRO EXTENDED
Security
Last updated 9/30/2011
Specify the default digital ID
To avoid being prompted to select a digital ID each time your sign or certify a PDF, you can select a default digital ID.
1 Do one of the following:
• In Acrobat, choose Advanced > Security Settings.
• In Reader, choose Document > Security Settings.
2 Click Digital IDs on the left, and then select the digital ID you want to use as the default.
3 Click the Usage Options button , and choose a task for which you want the digital ID as the default. To specify
the digital ID as the default for two tasks, click the Usage Options button again and select a second option.
A check mark appears next to selected options. If you select only the signing option, the Sign icon appears next to
the digital ID. If you select only the encryption option, the Lock icon appears. If you select only the certifying
option, or if you select the signing and certifying options, the Blue Ribbon icon appears.
To clear a default digital ID, repeat these steps, and deselect the usage options you selected.
Change the password and timeout for a digital ID
Passwords and timeouts can be set for PKCS #12 IDs. If the PKCS #12 ID contains multiple IDs, configure the
password and timeout at the file level.
Note: Self-signed digital IDs expire in five years. After the expiration date, you can use the ID to open, but not sign or
encrypt, a document.
1 Do one of the following:
• In Acrobat, choose Advanced > Security Settings.
• In Reader, choose Document > Security Settings.
2 Expand Digital IDs on the left, select Digital ID Files, and then select a digital ID on the right.
3 Click the Change Password button. Type the old password and a new password. Confirm the new password, and
then click OK.
4 With the ID still selected, click the Password Timeout button.
5 Specify how often you want to be prompted for a password:
Always Prompts you each time you use the digital ID.
After Lets you specify an interval.
Once Per Session Prompts you once each time you open Acrobat.
Never You’re never prompted for a password.
6 Type the password, and click OK.
Be sure to back up your password in a secure place. If you lose your password, either create a new self-signed digital
ID and delete the old one, or purchase one from a third-party provider.
Delete your digital ID
When you delete a digital ID in Acrobat, you delete the actual PKCS #12 file that contains both the private key and the
certificate. Before you delete your digital ID, make sure that it isn’t in use by other programs or required by any
documents for decrypting.