You must register a digital ID in Reader before
you can use it.
- Choose Document > Security Settings.
- Select Digital IDs, and click Add ID.
- Select Browse For An Existing Digital ID File.
- 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.