Adobe 22020737 Acrobat X Pro Manual - Page 247

USING ACROBAT X PRO 241 Security 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 Tools > Protection > More Protection > Security Settings. • In Reader, choose Edit > Protection > Security Settings. Note: If you don't see the Protection panel, see the instructions for adding panels at "Task panes" on page 9. 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. For each keystroke, the password strength meter evaluates your password and indicates the password strength using color patterns. 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, ensure that it isn't in use by other programs or required by any documents for decrypting. Note: You can delete only self-signed digital IDs that you created in Acrobat. A digital ID obtained from another provider cannot be deleted. 1 Do one of the following: • In Acrobat, choose Tools > Protection > More Protection > Security Settings. • In Reader, choose Edit > Protection > Security Settings. Note: If you don't see the Protection panel, see the instructions for adding panels at "Task panes" on page 9. 2 Select Digital IDs on the left, and then select the digital ID to remove. 3 Click Remove ID, and then click OK. More Help topics "Delete a certificate from trusted identities" on page 232 Protecting digital IDs By protecting your digital IDs, you can prevent unauthorized use of your private keys for signing or decrypting confidential documents. Ensure that you have a procedure in place in the event your digital ID is lost or stolen. Last updated 10/11/2011