OCSP

OCSP, or Online Certificate Status Protocol, is a system used to verify if a digital security certificate—like those that protect websites—is still valid and trustworthy. When you visit a secure website, your browser can check with an OCSP server to see if the website's certificate has been revoked or remains valid. This process helps ensure you're connecting to legitimate sites and not malicious ones, maintaining online security without lengthy delays. In essence, OCSP provides a quick, real-time check to confirm the trustworthiness of digital certificates.