# Register a digital ID

You must register a digital ID in Reader before you can use it.

1. Choose Document > Security Settings.
2. Select Digital IDs, and click Add ID.
3. Select Browse For An Existing Digital ID File.
4. Follow the on-screen instructions to select the digital ID file, type your password, and register the digital ID.

You can create self-signed digital IDs in Reader. Or, see the Adobe website for information on acquiring a digital ID from Adobe security partners.

Related Information

- About digital signatures