Adobe Acrobat 8 3D - Manual (Page 263)

256 ADOBE ACROBAT 3D VERSION 8
User Guide
Change the signing method
You may need to specify a different signing method than the default security method provided in Acrobat.
1 If necessary, install a third-party signature provider.
2 Choose Edit > Preferences (Windows) or Acrobat > Preferences (Mac OS), and click Security on the left.
3 Click Advanced Preferences, and click the Creation tab.
4 From the menu in the Creation tab, choose the default method you want for signing and encrypting documents,
and click OK.
The menu lists all the security methods installed in the Acrobat plug-ins folder.
Specify the default digital ID
Before you certify, sign, or encrypt a PDF, you may be prompted to select a digital ID file. To avoid being prompted
repeatedly, you can select a digital ID to use every time you sign or certify a document.
1 Choose Advanced > 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. If you want
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 Pen 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 a digital ID’s password and timeout
Passwords and timeouts can be set for PKCS #12 IDs and Windows Personal Certificates. If the PKCS #12 ID
contains multiple IDs, you must configure the password and timeout at the file level.
1 Choose Advanced > 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.