If a subscriber’s token is still valid but needs re-registration, what can be done?

When a subscriber's token is still valid but requires re-registration, sending the Certificate Revocation Information (CRI) via encrypted message serves an important purpose. The CRI allows the subscriber to verify the status of their certificate and ensure that it has not been revoked or is otherwise invalid. By using encryption, the information's confidentiality and integrity are maintained during transmission, protecting it from potential interception or manipulation.

This method allows for a secure and efficient process, enabling the subscriber to complete the re-registration process without needing to obtain a new token or visit in person. Other options, such as discarding the existing token or requiring a new one to be issued, would not be necessary if the token is still valid. Likewise, in-person visits can add complexity and inconvenience, whereas encrypted communication allows for a more streamlined approach.