What is a revocation list and how does it work?

What is a revocation list and how does it work?

A revocation list is a list of certificates that have been revoked before their expiration date. It helps ensure security by preventing the use of compromised certificates.

Why would a certificate be revoked?

Certificates can be revoked for several reasons, including compromise of the private key, changes in the information contained in the certificate, or if the entity is no longer trusted.

How is a revocation list communicated to users?

Revocation lists are typically communicated through Certificate Revocation Lists (CRLs) or Online Certificate Status Protocol (OCSP) responses, allowing users to check the validity of certificates.

What is the difference between CRL and OCSP?

CRL is a list of revoked certificates published at regular intervals, while OCSP provides real-time verification of a certificate's status.

How often should revocation lists be updated?

Revocation lists should be updated regularly, depending on the organization's policy, but typically at least once a day to ensure timely revocation information.