Final answer:
To realize a Certificate has been Revoked, one establishes a secure connection, checks the certificate's revocation status through OCSP or CRL, and upon finding it revoked, receives a notification and aborts the connection.
Step-by-step explanation:
To realize that a Certificate has been Revoked, it is important to understand the process of certificate revocation checks. A certificate can be revoked for several reasons such as if the private key is compromised or if the certificate was issued improperly. Here are the typical steps you would follow:
- Attempt to establish a secure connection using the certificate (such as an SSL/TLS connection).
- The client (e.g., a web browser) checks if the certificate is still valid by reaching out to the certificate authority (CA) or consulting a revocation list.
- If the certificate has been revoked, this check will fail, and the client should receive a notification or warning.
- The client should then abort the connection attempt to maintain security.
Technologies used to check the revocation status include the Online Certificate Status Protocol (OCSP) and Certificate Revocation Lists (CRLs).