VeriSign requires you to enter a Challenge Phrase, which is used like a password for future actions against your Digital ID. For example, if you lose your key pair, or your Digital ID is otherwise compromised, you must provide your Challenge Phrase to the Digital ID Center to verify that you are authorized to request revocation of the Digital ID. Choose a Challenge Phrase that will be easy for you to remember but hard for someone else to guess. Neither VeriSign nor Web.com will have access to your Challenge Phrase, so you must remember it. You will need this phrase later if you wish to revoke your certificate.