OCSP is a protocol that allows clients to query the CA or a trusted responder for the status of a specific certificate. OCSP requests and responses are smaller and faster than CRLs, and they can provide real-time information about the revocation status of a certificate12. CRLs are lists of all revoked certificates that are downloaded from the CA. CRLs can present issues, as they can become outdated and have to be downloaded frequently13. Therefore, OCSP reduces latency between the time a certificate is revoked and validation reflects this status. References: 1 https://sectigostore.com/blog/ocsp-vs-crl-whats-the-difference/ 2 https://www.keyfactor.com/blog/what-is-a-certificate-revocation-list-crl-vs-ocsp/ 3 https://www.fortinet.com/resources/cyberglossary/ocsp
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