To put it simply: OCSP responder = OCSP server. So, basically, the OCSP protocol is a real-time check of a website certificate’s revocation status.
It’s one method that web clients (browsers) use to determine the revocation status of a web server’s X.509 digital certificate when attempting to connect to a website. The online certificate status protocol is an internet protocol that’s described in the Internet Engineering Task Force’s (IETF) RFC 6960. What Is the Online Certificate Status Protocol? Unfortunately, we can’t cover all of them, so we’ll just touch on a select few in this article.īut what exactly is OCSP? How does it differ from certificate revocation lists (CRLs), OCSP stapling, and OCSP must-staple? What role does the OCSP protocol play in verifying a certificate’s revocation status? And where do we go from here to improve the revocation checking process? Of course, there are various enhancements to both of these revocation status check mechanisms. But how can their client or your web server verify whether a server’s SSL/TLS certificate is valid and hasn’t been revoked for one reason or another? There are two main types of certificate revocation status checks that are used by certificate authorities (CAs) - certificate revocation lists (CRLs) and the online certificate status protocol, or OCSP. But how does the browser know whether a website’s certificate has been revoked? OCSP is one way your web client can check…īefore an end user’s browser connects to a website via HTTPS, it needs to know that the site is using a valid SSL/TLS certificate.
In Hashing Out Cyber Security, Monthly Digest What happens when a hacker gets an SSL certificate’s private key? The CA revokes it.
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