Hello, you are using an old browser that's unsafe and no longer supported. Please consider updating your browser to a newer version, or downloading a modern browser.
Training Camp • Cybersecurity Glossary
The Online Certificate Status Protocol (OCSP) is a protocol used to check the revocation status of X.509 digital certificates in real-time.
Online Certificate Status Protocol Definition: The Online Certificate Status Protocol (OCSP) is a protocol used to check the revocation status of X.509 digital certificates in real-time.
Online Certificate Status Protocol (OCSP) is a protocol used to check the validity of digital certificates. It allows an entity to verify if a certificate issued by a Certificate Authority (CA) has been revoked or is still valid. OCSP enables real-time checking of a certificate's status by sending a request to the CA's OCSP responder, which then responds with the current status of the certificate, whether it is valid, revoked, or expired. This helps ensure the authenticity and trustworthiness of digital certificates used in secure communications over the internet.
Turn knowledge into credentials. Browse our instructor-led cybersecurity courses.
View All Courses →